diff --git a/node/wikibooks-nodejs-microservice/.gitignore b/node/wikibooks-nodejs-microservice/.gitignore
new file mode 100644
index 0000000000..25c8fdbaba
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/.gitignore
@@ -0,0 +1,2 @@
+node_modules
+package-lock.json
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/1-express/app1.js b/node/wikibooks-nodejs-microservice/2/1-express/app1.js
new file mode 100644
index 0000000000..22bf988205
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/1-express/app1.js
@@ -0,0 +1,8 @@
+let express = require('express');
+let app = express();
+
+app.get('/', (req, res) => {
+  res.send('Hello World');
+});
+
+app.listen(3000);
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/1-express/app2.js b/node/wikibooks-nodejs-microservice/2/1-express/app2.js
new file mode 100644
index 0000000000..e770685104
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/1-express/app2.js
@@ -0,0 +1,34 @@
+let express = require('express');
+let app = express();
+let stack = [];
+
+app.post('/stack', (req, res, next) => {
+  let buffer = '';
+
+  req.on('data', (data) => {
+    buffer += data;
+  });
+
+  req.on('end', () => {
+    stack.push(buffer);
+    return next();
+  });
+});
+
+app.delete('/stack', (req, res, next) => {
+  stack.pop();
+  return next();
+});
+
+app.get('/stack/:index', (req, res) => {
+  if (req.params.index >= 0 && req.params.index < stack.length) {
+    return res.end('' + stack[req.params.index]);
+  }
+  res.status(404).end();
+});
+
+app.use('/stack', (req, res) => {
+  res.send(stack);
+});
+
+app.listen(3000);
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/1-express/app3.js b/node/wikibooks-nodejs-microservice/2/1-express/app3.js
new file mode 100644
index 0000000000..ddb0aad496
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/1-express/app3.js
@@ -0,0 +1,33 @@
+let express = require('express');
+let body = require('body-parser');
+let route = express.Router();
+let app = express();
+let stack = [];
+
+app.use(body.text({ type: '*/*' }));
+
+route.post('/', (req, res, next) => {
+  stack.push(req.body);
+
+  return next();
+});
+
+route.delete('/', (req, res, next) => {
+  stack.pop();
+  return next();
+});
+
+route.get('/:index', (req, res) => {
+  if (req.params.index >= 0 && req.params.index < stack.length) {
+    return res.end('' + stack[req.params.index]);
+  }
+  res.status(404).end();
+});
+
+route.use('/', (req, res) => {
+  res.send(stack);
+});
+
+app.use('/stack', route);
+
+app.listen(3000);
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/1-express/package.json b/node/wikibooks-nodejs-microservice/2/1-express/package.json
new file mode 100644
index 0000000000..3deab32423
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/1-express/package.json
@@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "express": "^4.17.1"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/2/2-micro/app.js b/node/wikibooks-nodejs-microservice/2/2-micro/app.js
new file mode 100644
index 0000000000..415217cd3d
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/2-micro/app.js
@@ -0,0 +1,3 @@
+module.exports = (req, res) => {
+  res.end('Hello World');
+};
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/2-micro/package.json b/node/wikibooks-nodejs-microservice/2/2-micro/package.json
new file mode 100644
index 0000000000..3288245443
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/2-micro/package.json
@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "micro": "^9.3.4"
+  },
+  "scripts": {
+    "start": "micro app"
+  }
+}
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/3-seneca/.gitignore b/node/wikibooks-nodejs-microservice/2/3-seneca/.gitignore
new file mode 100644
index 0000000000..6320cd248d
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/3-seneca/.gitignore
@@ -0,0 +1 @@
+data
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/3-seneca/app1.js b/node/wikibooks-nodejs-microservice/2/3-seneca/app1.js
new file mode 100644
index 0000000000..20541e7e32
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/3-seneca/app1.js
@@ -0,0 +1,14 @@
+const seneca = require('seneca');
+const service = seneca({ log: 'silent' });
+
+service.add({ math: 'sum' }, (msg, next) => {
+  next(null, {
+    sum: msg.values.reduce((total, value) => (total + value), 0)
+  });
+});
+
+service.act({ math: 'sum', values: [1, 2, 3] }, (err, msg) => {
+  if (err) return console.error(err);
+
+  console.log('sum = %s', msg.sum);
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/3-seneca/app2.js b/node/wikibooks-nodejs-microservice/2/3-seneca/app2.js
new file mode 100644
index 0000000000..2e23fa3da9
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/3-seneca/app2.js
@@ -0,0 +1,25 @@
+const seneca = require('seneca');
+const service = seneca({ log: 'silent' });
+
+const stack = [];
+
+// http://localhost:3000/act?stack=push&value=one
+service.add('stack:push,value:*', (msg, next) => {
+  stack.push(msg.value);
+
+  next(null, stack);
+});
+
+// http://localhost:3000/act?stack=pop
+service.add('stack:pop', (msg, next) => {
+  stack.pop();
+
+  next(null, stack);
+});
+
+// http://localhost:3000/act?stack=get
+service.add('stack:get', (msg, next) => {
+  next(null, stack);
+});
+
+service.listen(3000);
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/3-seneca/app3.js b/node/wikibooks-nodejs-microservice/2/3-seneca/app3.js
new file mode 100644
index 0000000000..65d54b0802
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/3-seneca/app3.js
@@ -0,0 +1,41 @@
+const async = require('async');
+const seneca = require('seneca');
+const service = seneca({ log: 'silent' });
+
+service.use('basic');
+service.use('entity');
+service.use('jsonfile-store', { folder: 'data' });
+
+const stack = service.make$('stack');
+
+stack.load$((err) => {
+  if (err) throw err;
+
+  service.add('stack:push,value:*', (msg, next) => {
+    stack.make$().save$({ value: msg.value }, (err) => {
+      return next(err, { value: msg.value });
+    });
+  });
+
+  service.add('stack:pop,value:*', (msg, next) => {
+    stack.list$({ value: msg.value }, (err, items) => {
+      async.each(items, (item, next) => {
+        item.remove$(next);
+      }, (err) => {
+        if (err) return next(err);
+
+        return next(err, { remove: items.length });
+      });
+    });
+  });
+
+  service.add('stack:get', (msg, next) => {
+    stack.list$((err, items) => {
+      if (err) return next(err);
+
+      return next(null, items.map((item) => (item.value)));
+    });
+  });
+
+  service.listen(3000);
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/3-seneca/package.json b/node/wikibooks-nodejs-microservice/2/3-seneca/package.json
new file mode 100644
index 0000000000..96b60e028d
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/3-seneca/package.json
@@ -0,0 +1,9 @@
+{
+  "dependencies": {
+    "async": "^3.1.0",
+    "seneca": "^3.14.1",
+    "seneca-basic": "^0.6.0",
+    "seneca-entity": "^4.1.0",
+    "seneca-jsonfile-store": "^1.1.0"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/description.md b/node/wikibooks-nodejs-microservice/2/4-hydra/description.md
new file mode 100644
index 0000000000..2a9d5269e3
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/description.md
@@ -0,0 +1,21 @@
+## 2 - 4 히드라(Hydra)
+
+- `npm i -g yo generator-fwsp-hydra hydra-cli`
+
+- `hydra-cli config local`
+	- `redisUrl: 127.0.0.1 redisPort: 6379 redisDb: 15`
+
+- `yo fwsp-hydra`
+	- ? Name of the service (`-service` will be appended automatically) hello
+	- ? Your full name?
+	- ? Your email address?
+	- ? Your organization or username? (used to tag docker images)
+	- ? Host the service runs on?
+	- ? Port the service runs on? 0
+	- ? What does this service do?
+	- ? Does this service need auth? No
+	- ? Is this a hydra-express service? Yes
+	- ? Set up a view engine? No
+	- ? Set up logging? No
+	- ? Enable CORS on serverResponses? No
+	- ? Run npm install? No
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.editorconfig b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.editorconfig
new file mode 100644
index 0000000000..c0f2cb2c8b
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.editorconfig
@@ -0,0 +1,10 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.eslintrc b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.eslintrc
new file mode 100644
index 0000000000..e498908ea5
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.eslintrc
@@ -0,0 +1,97 @@
+{
+  "plugins": ["jasmine"],
+  "extends": ["eslint:recommended", "plugin:jasmine/recommended"],
+  "parserOptions": {
+    "ecmaVersion": 6,
+    "ecmaFeatures": {
+      "jsx": true
+    },
+    "sourceType": "module"
+  },
+  "rules": {
+    "valid-jsdoc": [2, {
+     "requireReturn": false
+    }],
+    "comma-dangle": 0,
+    "curly": 2,
+    "semi": [2, "always"],
+    "no-console": 0,
+    "no-debugger": 2,
+    "no-extra-semi": 2,
+    "no-constant-condition": 2,
+    "no-alert": 2,
+    "no-unused-vars": ["error", { "argsIgnorePattern": "^(?:reject|_)" }],
+    "one-var-declaration-per-line": 2,
+    "operator-linebreak": [
+      2,
+      "after"
+    ],
+    "max-len": [
+      2,
+      240
+    ],
+    "indent": [
+      2,
+      2,
+      {
+        "SwitchCase": 1
+      }
+    ],
+    "quotes": [
+      2,
+      "single",
+      {
+        "avoidEscape": true
+      }
+    ],
+    "no-multi-str": 2,
+    "no-mixed-spaces-and-tabs": 2,
+    "no-trailing-spaces": 2,
+    "space-unary-ops": [
+      2,
+      {
+        "nonwords": false,
+        "overrides": {}
+      }
+    ],
+    "one-var": [
+      2,
+      {
+        "uninitialized": "always",
+        "initialized": "never"
+      }
+    ],
+    "keyword-spacing": [
+      2,
+      {}
+    ],
+    "space-infix-ops": 2,
+    "space-before-blocks": [
+      2,
+      "always"
+    ],
+    "eol-last": 2,
+    "space-in-parens": [
+      2,
+      "never"
+    ],
+    "no-multiple-empty-lines": 2,
+    "no-multi-spaces": 2,
+    "key-spacing": [
+      2,
+      {
+        "beforeColon": false,
+        "afterColon": true
+      }
+    ]
+  },
+  "env": {
+    "browser": true,
+    "node": true,
+    "es6": true,
+    "jasmine": true
+  },
+  "globals": {
+    "-": 0
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.gitattributes b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.gitattributes
new file mode 100644
index 0000000000..a3f05d060c
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.gitattributes
@@ -0,0 +1,2 @@
+*.apib linguist-documentation
+
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.gitignore b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.gitignore
new file mode 100644
index 0000000000..0cf3873046
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.gitignore
@@ -0,0 +1,7 @@
+.DS_Store
+*.log
+*.pem
+*.rsa
+node_modules
+config/config.json
+*/public
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.nvmrc b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.nvmrc
new file mode 100644
index 0000000000..3410944e13
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/.nvmrc
@@ -0,0 +1 @@
+v6.2.1
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/config/sample-config.json b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/config/sample-config.json
new file mode 100644
index 0000000000..abfc25e0b1
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/config/sample-config.json
@@ -0,0 +1,15 @@
+{
+  "environment": "development",
+  "hydra": {
+    "serviceName": "hello-service",
+    "serviceIP": "",
+    "servicePort": 0,
+    "serviceType": "hello",
+    "serviceDescription": "",
+    "redis": {
+      "url": "127.0.0.1",
+      "port": 6379,
+      "db": 15
+    }
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/hello-service.js b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/hello-service.js
new file mode 100644
index 0000000000..18e97613e0
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/hello-service.js
@@ -0,0 +1,28 @@
+/**
+* @name Hello
+* @summary Hello Hydra Express service entry point
+* @description 
+*/
+'use strict';
+
+const version = require('./package.json').version;
+const hydraExpress = require('hydra-express');
+
+
+
+let config = require('fwsp-config');
+
+/**
+* Load configuration file and initialize hydraExpress app
+*/
+config.init('./config/config.json')
+  .then(() => {
+    config.version = version;
+    return hydraExpress.init(config.getObject(), version, () => {
+      hydraExpress.registerRoutes({
+        '/v1/hello': require('./routes/hello-v1-routes')
+      });
+    });
+  })
+  .then(serviceInfo => console.log('serviceInfo', serviceInfo))
+  .catch(err => console.log('err', err));
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/package.json b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/package.json
new file mode 100644
index 0000000000..6950b6b283
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/package.json
@@ -0,0 +1,26 @@
+{
+  "name": "hello-service",
+  "version": "0.0.1",
+  "author": " <>",
+  "private": true,
+  "scripts": {
+    "start": "node hello-service.js",
+    "debug": "node-debug hello-service.js --debug-brk",
+    "test": "mocha specs --reporter spec",
+    "docker": "node scripts/docker.js"
+  },
+  "engines": {
+    "node": ">=6.2.1"
+  },
+  "dependencies": {
+    "fwsp-config": "1.1.5",
+    "hydra-express": "1.7.1",
+    "fwsp-server-response": "2.2.6"
+  },
+  "devDependencies": {
+    "chai": "3.5.0",
+    "eslint": "3.16.0",
+    "mocha": "3.2.0",
+    "superagent": "3.5.2"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/routes/hello-v1-routes.js b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/routes/hello-v1-routes.js
new file mode 100644
index 0000000000..89adcd82fa
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/routes/hello-v1-routes.js
@@ -0,0 +1,27 @@
+/**
+ * @name hello-v1-api
+ * @description This module packages the Hello API.
+ */
+'use strict';
+
+const hydraExpress = require('hydra-express');
+const hydra = hydraExpress.getHydra();
+const express = hydraExpress.getExpress();
+const ServerResponse = require('fwsp-server-response');
+
+let serverResponse = new ServerResponse();
+express.response.sendError = function(err) {
+  serverResponse.sendServerError(this, {result: {error: err}});
+};
+express.response.sendOk = function(result) {
+  serverResponse.sendOk(this, {result});
+};
+
+let api = express.Router();
+
+api.get('/',
+(req, res) => {
+  res.sendOk({greeting: 'Welcome to Hydra Express!'});
+});
+
+module.exports = api;
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/scripts/docker.js b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/scripts/docker.js
new file mode 100644
index 0000000000..5e0850194e
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/scripts/docker.js
@@ -0,0 +1,64 @@
+const config = require('fwsp-config'),
+  fs = require('fs'),
+  spawn = require('child_process').spawn,
+  tag = `/${process.env.npm_package_name}:${process.env.npm_package_version}`;
+modes = {
+  build: ['docker', ['build', '-t', tag, process.cwd()], { stdio: 'inherit' }],
+  run: ['docker', ['run', '-it', tag], { stdio: 'inherit' }],
+  up: ['docker', ['run', '-d', tag], { detached: true }]
+},
+  getDockerfile = (exposePort, logger = false) => `
+      FROM node:6.3
+      MAINTAINER  
+      EXPOSE ${exposePort}
+      ARG NPM_TOKEN
+      RUN mkdir -p /usr/src/app
+      WORKDIR /usr/src/app
+      ADD . /usr/src/app
+      RUN echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > .npmrc
+      ${logger ? 'RUN npm install pino-elasticsearch -g' : ''}
+      RUN npm install --production
+      RUN rm -f .npmrc
+      CMD ["npm", "start"]
+      `,
+  run = (mode) => {
+    console.log(`Running '${[modes[mode][0], ...modes[mode][1]].join(' ')}'`);
+    let docker = spawn(...modes[mode]);
+    docker.on('close', code => console.log(`docker ${mode} exited with code ${code}`));
+  };
+
+let mode = process.argv[2];
+if (!modes[mode]) {
+  console.log(`No such mode '${mode}'. Available modes: ${Object.keys(modes).join(', ')}.`);
+  return;
+}
+if (mode === 'build') {
+  if (!fs.existsSync('config/config.json')) {
+    console.log('config/config.json must exist to build docker image');
+    process.exit(1);
+  }
+  if (fs.existsSync('Dockerfile')) {
+    run(mode);
+  } else {
+    console.log('No Dockerfile found, loading config.json and generating one...');
+    config.init('./config/config.json')
+      .then(() => {
+        let Dockerfile = getDockerfile(
+          config.hydra.servicePort,
+          config.hydra.plugins && config.hydra.plugins.logger ? true : false
+        ).split(/\n/).map(v => v.trim()).filter(v => v.length).join('\n');
+        console.log(Dockerfile);
+        fs.writeFile('Dockerfile', Dockerfile, err => {
+          if (err) {
+            console.log('Error writing Dockerfile', err);
+            process.exit(1);
+          } else {
+            console.log('Wrote Dockerfile');
+            run(mode);
+          }
+        });
+      });
+  }
+} else {
+  run(mode);
+}
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/specs/helpers/chai.js b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/specs/helpers/chai.js
new file mode 100644
index 0000000000..ae951a6e67
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/specs/helpers/chai.js
@@ -0,0 +1,10 @@
+'use strict';
+
+var chai = require('chai');
+
+chai.config.includeStack = true;
+
+global.expect = chai.expect;
+global.AssertionError = chai.AssertionError;
+global.Assertion = chai.Assertion;
+global.assert = chai.assert;
diff --git a/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/specs/test.js b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/specs/test.js
new file mode 100644
index 0000000000..e3013e9ab0
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/2/4-hydra/hello-service/specs/test.js
@@ -0,0 +1,10 @@
+'use strict';
+
+/**
+* Change into specs folder so that file loading works.
+*/
+process.chdir('./specs');
+
+require('./helpers/chai.js');
+
+// Tests go here.
diff --git a/node/wikibooks-nodejs-microservice/3/1-express/.gitignore b/node/wikibooks-nodejs-microservice/3/1-express/.gitignore
new file mode 100644
index 0000000000..95a48fbcd4
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/1-express/.gitignore
@@ -0,0 +1 @@
+uploads
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/3/1-express/app.js b/node/wikibooks-nodejs-microservice/3/1-express/app.js
new file mode 100644
index 0000000000..c352ff3b05
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/1-express/app.js
@@ -0,0 +1,135 @@
+const express = require('express');
+const sharp = require('sharp');
+const bodyparser = require('body-parser');
+const path = require('path');
+const fs = require('fs');
+const app = express();
+
+app.param('image', (req, res, next, image) => {
+  if (!image.match(/\.(png|jpg)$/i)) {
+    return res.status(req.method === 'POST' ? 403 : 404).end();
+  }
+
+  req.image = image;
+
+  req.localpath = path.join(__dirname, 'uploads', req.image);
+
+  return next();
+});
+
+app.post('/uploads/:image', bodyparser.raw({
+  limit: '10mb',
+  type: 'image/*'
+}), (req, res) => {
+  let fd = fs.createWriteStream(req.localpath, {
+    flags: 'w+',
+    encoding: 'binary'
+  });
+
+  fd.write(req.body);
+  fd.end();
+
+  fd.on('close', () => {
+    res.send({ status: 'ok', size: req.body.length });
+  });
+});
+
+app.head('/uploads/:image', (req, res) => {
+  fs.access(
+    req.localpath,
+    fs.constants.R_OK,
+    (err) => {
+      res.status(err ? 404 : 200).end();
+    },
+  );
+});
+
+app.get("/uploads/:image", (req, res) => {
+  fs.access(req.localpath, fs.constants.R_OK, (err) => {
+    if (err) return res.status(404).end();
+
+    let image = sharp(req.localpath);
+
+    let width = +req.query.width;
+    let height = +req.query.height;
+    let blur = +req.query.blur;
+    let sharpen = +req.query.sharpen;
+    let greyscale = ['y', 'yes', '1', 'on'].includes(req.query.greyscale);
+    let flip = ['y', 'yes', '1', 'on'].includes(req.query.flip);
+    let flop = ['y', 'yes', '1', 'on'].includes(req.query.flop);
+
+    if (width > 0 && height > 0) {
+      image.ignoreAspectRatio();
+    }
+
+    if (width > 0 || height > 0) {
+      image.resize(width || null, height || null);
+    }
+
+    if (flip) image.flip();
+    if (flop) image.flop();
+    if (blur > 0) image.blur(blur);
+    if (sharpen > 0) image.sharpen(sharpen);
+    if (greyscale) image.greyscale();
+
+    res.setHeader('Content-Type', 'image/' + path.extname(req.image).substr(1));
+
+    image.pipe(res);
+  });
+});
+
+app.get(/\/thumbnail\.(jpg|png)/, (req, res, next) => {
+  let format = (req.params[0] === 'png' ? 'png' : 'jpeg');
+  let width = +req.query.width || 300;
+  let height = +req.query.height || 200;
+  let border = +req.query.border || 5;
+  let bgcolor = req.query.bgcolor || '#fcfcfc';
+  let fgcolor = req.query.fgcolor || '#ddd';
+  let textcolor = req.query.textcolor || '#aaa';
+  let textsize = +req.query.textsize || 24;
+  let image = sharp({
+    create: {
+      width,
+      height,
+      channels: 4,
+      background: { r: 0, g: 0, b: 0 },
+    },
+  });
+
+  const thumbnail = Buffer.from(`
+<svg width="${width}" height="${height}">
+  <rect
+    x="0" y="0"
+    width="${width}" height="${height}"
+    fill="${fgcolor}" />
+  <rect
+    x="${border}" y="${border}"
+    width="${width - border * 2}" height="${height - border * 2}"
+    fill="${bgcolor}" />
+  <line
+    x1="${border * 2}" y1="${border * 2}"
+    x2="${width - border * 2}" y2="${height - border * 2}"
+    stroke-width="${border}" stroke="${fgcolor}" />
+  <line
+    x1="${width - border * 2}" y1="${border * 2}"
+    x2="${border * 2}" y2="${height - border * 2}"
+    stroke-width="${border}" stroke="${fgcolor}" />
+  <rect
+    x="${border}" y="${(height - textsize) / 2}"
+    width="${width - border * 2}" height="${textsize}"
+    fill="${bgcolor}" />
+  <text
+    x="${width / 2}" y="${height / 2}" dy="8"
+    font-family="Helvetica" font-size="${textsize}"
+    fill="${textcolor}" text-anchor="middle">
+    ${width} x ${height}
+  </text>
+</svg>
+  `);
+
+  image.overlayWith(thumbnail)[format]().pipe(res);
+});
+
+app.listen(3000, () => {
+  console.log('ready');
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/3/1-express/description.md b/node/wikibooks-nodejs-microservice/3/1-express/description.md
new file mode 100644
index 0000000000..88dafb6cae
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/1-express/description.md
@@ -0,0 +1,7 @@
+## 3 - 1 - 1 이미지 업로드
+
+- `curl -X POST -H 'Content-Type: image/png' --data-binary @example.png http://localhost:3000/uploads/example.png`
+
+## 3 - 1 - 2 폴더에 이미지가 있는지 확인
+
+- `curl --head 'http://localhost:3000/uploads/example.png'`
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/3/1-express/example.png b/node/wikibooks-nodejs-microservice/3/1-express/example.png
new file mode 100644
index 0000000000..fd4089b315
Binary files /dev/null and b/node/wikibooks-nodejs-microservice/3/1-express/example.png differ
diff --git a/node/wikibooks-nodejs-microservice/3/1-express/package.json b/node/wikibooks-nodejs-microservice/3/1-express/package.json
new file mode 100644
index 0000000000..382e9c9b43
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/1-express/package.json
@@ -0,0 +1,7 @@
+{
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "express": "^4.17.1",
+    "sharp": "^0.19.0"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/description.md b/node/wikibooks-nodejs-microservice/3/2-hydra/description.md
new file mode 100644
index 0000000000..389ef581fe
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/description.md
@@ -0,0 +1,18 @@
+## 3 - 2 히드라 사용
+
+- `yo fwsp-hydra`
+	- ? Name of the service (`-service` will be appended automatically) imagini
+	- ? Your full name?
+	- ? Your email address?
+	- ? Your organization or username? (used to tag docker images)
+	- ? Host the service runs on?
+	- ? Port the service runs on? 3000
+	- ? What does this service do?
+	- ? Does this service need auth? No
+	- ? Is this a hydra-express service? Yes
+	- ? Set up a view engine? No
+	- ? Set up logging? No
+	- ? Enable CORS on serverResponses? No
+	- ? Run npm install? No
+
+- `curl -X POST -H 'Content-Type: image/png' --data-binary @example.png http://localhost:3000/v1/imagini/example.png`
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/example.png b/node/wikibooks-nodejs-microservice/3/2-hydra/example.png
new file mode 100644
index 0000000000..fd4089b315
Binary files /dev/null and b/node/wikibooks-nodejs-microservice/3/2-hydra/example.png differ
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.editorconfig b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.editorconfig
new file mode 100644
index 0000000000..c0f2cb2c8b
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.editorconfig
@@ -0,0 +1,10 @@
+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.eslintrc b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.eslintrc
new file mode 100644
index 0000000000..e498908ea5
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.eslintrc
@@ -0,0 +1,97 @@
+{
+  "plugins": ["jasmine"],
+  "extends": ["eslint:recommended", "plugin:jasmine/recommended"],
+  "parserOptions": {
+    "ecmaVersion": 6,
+    "ecmaFeatures": {
+      "jsx": true
+    },
+    "sourceType": "module"
+  },
+  "rules": {
+    "valid-jsdoc": [2, {
+     "requireReturn": false
+    }],
+    "comma-dangle": 0,
+    "curly": 2,
+    "semi": [2, "always"],
+    "no-console": 0,
+    "no-debugger": 2,
+    "no-extra-semi": 2,
+    "no-constant-condition": 2,
+    "no-alert": 2,
+    "no-unused-vars": ["error", { "argsIgnorePattern": "^(?:reject|_)" }],
+    "one-var-declaration-per-line": 2,
+    "operator-linebreak": [
+      2,
+      "after"
+    ],
+    "max-len": [
+      2,
+      240
+    ],
+    "indent": [
+      2,
+      2,
+      {
+        "SwitchCase": 1
+      }
+    ],
+    "quotes": [
+      2,
+      "single",
+      {
+        "avoidEscape": true
+      }
+    ],
+    "no-multi-str": 2,
+    "no-mixed-spaces-and-tabs": 2,
+    "no-trailing-spaces": 2,
+    "space-unary-ops": [
+      2,
+      {
+        "nonwords": false,
+        "overrides": {}
+      }
+    ],
+    "one-var": [
+      2,
+      {
+        "uninitialized": "always",
+        "initialized": "never"
+      }
+    ],
+    "keyword-spacing": [
+      2,
+      {}
+    ],
+    "space-infix-ops": 2,
+    "space-before-blocks": [
+      2,
+      "always"
+    ],
+    "eol-last": 2,
+    "space-in-parens": [
+      2,
+      "never"
+    ],
+    "no-multiple-empty-lines": 2,
+    "no-multi-spaces": 2,
+    "key-spacing": [
+      2,
+      {
+        "beforeColon": false,
+        "afterColon": true
+      }
+    ]
+  },
+  "env": {
+    "browser": true,
+    "node": true,
+    "es6": true,
+    "jasmine": true
+  },
+  "globals": {
+    "-": 0
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.gitattributes b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.gitattributes
new file mode 100644
index 0000000000..a3f05d060c
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.gitattributes
@@ -0,0 +1,2 @@
+*.apib linguist-documentation
+
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.gitignore b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.gitignore
new file mode 100644
index 0000000000..527ac902b9
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.gitignore
@@ -0,0 +1,9 @@
+.DS_Store
+*.log
+*.pem
+*.rsa
+node_modules
+config/config.json
+*/public
+
+uploads
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.nvmrc b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.nvmrc
new file mode 100644
index 0000000000..3410944e13
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/.nvmrc
@@ -0,0 +1 @@
+v6.2.1
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/config/sample-config.json b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/config/sample-config.json
new file mode 100644
index 0000000000..9bbf186114
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/config/sample-config.json
@@ -0,0 +1,15 @@
+{
+  "environment": "development",
+  "hydra": {
+    "serviceName": "imagini-service",
+    "serviceIP": "",
+    "servicePort": 3000,
+    "serviceType": "imagini",
+    "serviceDescription": "",
+    "redis": {
+      "url": "127.0.0.1",
+      "port": 6379,
+      "db": 15
+    }
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/imagini-service.js b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/imagini-service.js
new file mode 100644
index 0000000000..5867fd8750
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/imagini-service.js
@@ -0,0 +1,28 @@
+/**
+* @name Imagini
+* @summary Imagini Hydra Express service entry point
+* @description 
+*/
+'use strict';
+
+const version = require('./package.json').version;
+const hydraExpress = require('hydra-express');
+
+
+
+let config = require('fwsp-config');
+
+/**
+* Load configuration file and initialize hydraExpress app
+*/
+config.init('./config/config.json')
+  .then(() => {
+    config.version = version;
+    return hydraExpress.init(config.getObject(), version, () => {
+      hydraExpress.registerRoutes({
+        '/v1/imagini': require('./routes/imagini-v1-routes')
+      });
+    });
+  })
+  .then(serviceInfo => console.log('serviceInfo', serviceInfo))
+  .catch(err => console.log('err', err));
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/package.json b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/package.json
new file mode 100644
index 0000000000..c334baca2a
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/package.json
@@ -0,0 +1,28 @@
+{
+  "name": "imagini-service",
+  "version": "0.0.1",
+  "author": " <>",
+  "private": true,
+  "scripts": {
+    "start": "node imagini-service.js",
+    "debug": "node-debug imagini-service.js --debug-brk",
+    "test": "mocha specs --reporter spec",
+    "docker": "node scripts/docker.js"
+  },
+  "engines": {
+    "node": ">=6.2.1"
+  },
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "fwsp-config": "1.1.5",
+    "fwsp-server-response": "2.2.6",
+    "hydra-express": "1.7.1",
+    "sharp": "^0.23.0"
+  },
+  "devDependencies": {
+    "chai": "3.5.0",
+    "eslint": "3.16.0",
+    "mocha": "3.2.0",
+    "superagent": "3.5.2"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/routes/imagini-v1-routes.js b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/routes/imagini-v1-routes.js
new file mode 100644
index 0000000000..e3258302ad
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/routes/imagini-v1-routes.js
@@ -0,0 +1,100 @@
+/**
+ * @name imagini-v1-api
+ * @description This module packages the Imagini API.
+ */
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const sharp = require('sharp');
+const bodyparser = require('body-parser');
+const hydraExpress = require('hydra-express');
+const ServerResponse = require('fwsp-server-response');
+const hydra = hydraExpress.getHydra();
+const express = hydraExpress.getExpress();
+
+let serverResponse = new ServerResponse();
+
+express.response.sendError = function (err) {
+  serverResponse.sendServerError(this, { result: { error: err } });
+};
+express.response.sendOk = function (result) {
+  serverResponse.sendOk(this, { result });
+};
+
+let api = express.Router();
+
+api.param('image', (req, res, next, image) => {
+  if (!image.match(/\.(png|jpg)$/i)) {
+    return res.sendError('invalid image type/extension');
+  }
+
+  req.image = image;
+  req.localpath = path.join(__dirname, '../uploads', req.image);
+
+  return next();
+});
+
+api.post('/:image', bodyparser.raw({
+  limit: '10mb',
+  type: 'image/*'
+}), (req, res) => {
+  let fd = fs.createWriteStream(req.localpath, {
+    flags: 'w+',
+    encoding: 'binary'
+  });
+
+  fd.end(req.body);
+
+  fd.on('close', () => {
+    res.sendOk({ size: req.body.length });
+  });
+});
+
+api.head('/:image', (req, res) => {
+  fs.access(req.localpath, fs.constants.R_OK, (err) => {
+    if (err) {
+      return res.sendError('image not found');
+    }
+
+    return res.sendOk();
+  });
+});
+
+api.get('/:image', (req, res) => {
+  fs.access(req.localpath, fs.constants.R_OK, (err) => {
+    if (err) {
+      return res.sendError('image not found');
+    }
+
+    let image = sharp(req.localpath);
+
+    let width = +req.query.width;
+    let height = +req.query.height;
+    let blur = +req.query.blur;
+    let sharpen = +req.query.sharpen;
+    let greyscale = ['y', 'yes', '1', 'on'].includes(req.query.greyscale);
+    let flip = ['y', 'yes', '1', 'on'].includes(req.query.flip);
+    let flop = ['y', 'yes', '1', 'on'].includes(req.query.flop);
+
+    if (width > 0 && height > 0) {
+      image.ignoreAspectRatio();
+    }
+
+    if (width > 0 || height > 0) {
+      image.resize(width || null, height || null);
+    }
+
+    if (flip) image.flip();
+    if (flop) image.flop();
+    if (blur > 0) image.blur(blur);
+    if (sharpen > 0) image.sharpen(sharpen);
+    if (greyscale) image.greyscale();
+
+    res.setHeader('Content-Type', 'image/' + path.extname(req.image).substr(1));
+
+    image.pipe(res);
+  });
+})
+
+module.exports = api;
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/scripts/docker.js b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/scripts/docker.js
new file mode 100644
index 0000000000..5e0850194e
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/scripts/docker.js
@@ -0,0 +1,64 @@
+const config = require('fwsp-config'),
+  fs = require('fs'),
+  spawn = require('child_process').spawn,
+  tag = `/${process.env.npm_package_name}:${process.env.npm_package_version}`;
+modes = {
+  build: ['docker', ['build', '-t', tag, process.cwd()], { stdio: 'inherit' }],
+  run: ['docker', ['run', '-it', tag], { stdio: 'inherit' }],
+  up: ['docker', ['run', '-d', tag], { detached: true }]
+},
+  getDockerfile = (exposePort, logger = false) => `
+      FROM node:6.3
+      MAINTAINER  
+      EXPOSE ${exposePort}
+      ARG NPM_TOKEN
+      RUN mkdir -p /usr/src/app
+      WORKDIR /usr/src/app
+      ADD . /usr/src/app
+      RUN echo "//registry.npmjs.org/:_authToken=\${NPM_TOKEN}" > .npmrc
+      ${logger ? 'RUN npm install pino-elasticsearch -g' : ''}
+      RUN npm install --production
+      RUN rm -f .npmrc
+      CMD ["npm", "start"]
+      `,
+  run = (mode) => {
+    console.log(`Running '${[modes[mode][0], ...modes[mode][1]].join(' ')}'`);
+    let docker = spawn(...modes[mode]);
+    docker.on('close', code => console.log(`docker ${mode} exited with code ${code}`));
+  };
+
+let mode = process.argv[2];
+if (!modes[mode]) {
+  console.log(`No such mode '${mode}'. Available modes: ${Object.keys(modes).join(', ')}.`);
+  return;
+}
+if (mode === 'build') {
+  if (!fs.existsSync('config/config.json')) {
+    console.log('config/config.json must exist to build docker image');
+    process.exit(1);
+  }
+  if (fs.existsSync('Dockerfile')) {
+    run(mode);
+  } else {
+    console.log('No Dockerfile found, loading config.json and generating one...');
+    config.init('./config/config.json')
+      .then(() => {
+        let Dockerfile = getDockerfile(
+          config.hydra.servicePort,
+          config.hydra.plugins && config.hydra.plugins.logger ? true : false
+        ).split(/\n/).map(v => v.trim()).filter(v => v.length).join('\n');
+        console.log(Dockerfile);
+        fs.writeFile('Dockerfile', Dockerfile, err => {
+          if (err) {
+            console.log('Error writing Dockerfile', err);
+            process.exit(1);
+          } else {
+            console.log('Wrote Dockerfile');
+            run(mode);
+          }
+        });
+      });
+  }
+} else {
+  run(mode);
+}
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/specs/helpers/chai.js b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/specs/helpers/chai.js
new file mode 100644
index 0000000000..ae951a6e67
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/specs/helpers/chai.js
@@ -0,0 +1,10 @@
+'use strict';
+
+var chai = require('chai');
+
+chai.config.includeStack = true;
+
+global.expect = chai.expect;
+global.AssertionError = chai.AssertionError;
+global.Assertion = chai.Assertion;
+global.assert = chai.assert;
diff --git a/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/specs/test.js b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/specs/test.js
new file mode 100644
index 0000000000..e3013e9ab0
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/2-hydra/imagini-service/specs/test.js
@@ -0,0 +1,10 @@
+'use strict';
+
+/**
+* Change into specs folder so that file loading works.
+*/
+process.chdir('./specs');
+
+require('./helpers/chai.js');
+
+// Tests go here.
diff --git a/node/wikibooks-nodejs-microservice/3/3-seneca/.gitignore b/node/wikibooks-nodejs-microservice/3/3-seneca/.gitignore
new file mode 100644
index 0000000000..95a48fbcd4
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/3-seneca/.gitignore
@@ -0,0 +1 @@
+uploads
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/3/3-seneca/description.md b/node/wikibooks-nodejs-microservice/3/3-seneca/description.md
new file mode 100644
index 0000000000..d7569a1ece
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/3-seneca/description.md
@@ -0,0 +1,7 @@
+## 3 - 3 세네카 사용
+
+- `curl -H 'Content-Type: application/json' --data '{"role":"upload","image":"example.png","data":"'"$(base64 example.png)"'"}' http://localhost:3000/act`
+
+- `curl -H 'Content-Type: application/json' --data '{"role":"check", "image": "example.png"}' http://localhost:3000/act`
+
+- `curl -H 'Content-Type: application/json' --data '{"role":"download", "image": "example.png","greyscale":true,"height":100}' http://localhost:3000/act`
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/3/3-seneca/example.png b/node/wikibooks-nodejs-microservice/3/3-seneca/example.png
new file mode 100644
index 0000000000..fd4089b315
Binary files /dev/null and b/node/wikibooks-nodejs-microservice/3/3-seneca/example.png differ
diff --git a/node/wikibooks-nodejs-microservice/3/3-seneca/imagini.js b/node/wikibooks-nodejs-microservice/3/3-seneca/imagini.js
new file mode 100644
index 0000000000..cdee4e4d98
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/3-seneca/imagini.js
@@ -0,0 +1,48 @@
+const sharp = require('sharp');
+const path = require('path');
+const fs = require('fs');
+
+module.exports = function (settings = { path: 'uploads' }) {
+  const localpath = (image) => (path.join(settings.path, image));
+
+  const access = (filename, next) => {
+    fs.access(filename, fs.constants.R_OK, (err) => {
+      return next(!err, filename);
+    });
+  };
+
+  this.add('role:check,image:*', function (msg, next) {
+    access(localpath(msg.image), (exists) => (next(null, { exists })));
+  });
+
+  this.add('role:upload,image:*,data:*', (msg, next) => {
+    let data = Buffer.from(msg.data, 'base64');
+
+    fs.writeFile(localpath(msg.image), data, (err) => {
+      return next(err, { size: data.length });
+    });
+  });
+
+  this.add('role:download,image:*', (msg, next) => {
+    access(localpath(msg.image), (exists, filename) => {
+      if (!exists) return next(new Error('image not found'));
+
+      let image = sharp(filename);
+
+      let width = +msg.width || null;
+      let height = +msg.height || null;
+
+      if (width && height) image.ignoreAspectRatio();
+      if (width || height) image.resize(width || null, height || null);
+      if (msg.flip) image.flip();
+      if (msg.flop) image.flop();
+      if (msg.blur > 0) image.blur(msg.blur);
+      if (msg.sharpen > 0) image.sharpen(msg.sharpen);
+      if (msg.greyscale) image.greyscale();
+
+      image.toBuffer().then((data) => {
+        return next(null, { data: data.toString('base64') });
+      });
+    })
+  })
+};
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/3/3-seneca/package.json b/node/wikibooks-nodejs-microservice/3/3-seneca/package.json
new file mode 100644
index 0000000000..1fa47cbcf4
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/3-seneca/package.json
@@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "seneca": "^3.14.1",
+    "sharp": "^0.23.0"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/3/3-seneca/seneca.js b/node/wikibooks-nodejs-microservice/3/3-seneca/seneca.js
new file mode 100644
index 0000000000..2bb704af40
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/3/3-seneca/seneca.js
@@ -0,0 +1,6 @@
+const seneca = require('seneca');
+const service = seneca({ log: 'silent' });
+
+service.use('./imagini.js', { path: __dirname + '/uploads' });
+
+service.listen(3000);
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/4/mysql/description.md b/node/wikibooks-nodejs-microservice/4/mysql/description.md
new file mode 100644
index 0000000000..05f236acb4
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/4/mysql/description.md
@@ -0,0 +1,7 @@
+## 4 상태와 보안 - 1 상태 - 2 MySQL
+
+- `curl -X POST -H 'Content-Type: image/png' --data-binary @example.png http://localhost:3000/uploads/test.png`
+
+- `curl --head http://localhost:3000/uploads/test.png`
+
+- `curl -v -X DELETE http://localhost:3000/uploads/test.png`
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/4/mysql/example.png b/node/wikibooks-nodejs-microservice/4/mysql/example.png
new file mode 100644
index 0000000000..fd4089b315
Binary files /dev/null and b/node/wikibooks-nodejs-microservice/4/mysql/example.png differ
diff --git a/node/wikibooks-nodejs-microservice/4/mysql/imagini.js b/node/wikibooks-nodejs-microservice/4/mysql/imagini.js
new file mode 100644
index 0000000000..fb0a5efe1a
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/4/mysql/imagini.js
@@ -0,0 +1,133 @@
+const settings = require('./settings');
+const mysql = require('mysql');
+const db = mysql.createConnection(settings.db);
+const express = require('express');
+const sharp = require('sharp');
+const bodyparser = require('body-parser');
+const path = require('path');
+const app = express();
+
+db.connect((err) => {
+  if (err) throw err;
+
+  console.log('db: ready');
+
+  db.query(`
+    CREATE TABLE IF NOT EXISTS images
+    (
+        id           INT(11)      UNSIGNED NOT NULL AUTO_INCREMENT,
+        date_created TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        date_used    TIMESTAMP    NULL DEFAULT NULL,
+        name         VARCHAR(300) NOT NULL,
+        size         INT(11)      UNSIGNED NOT NULL,
+        data         LONGBLOB     NOT NULL,
+      PRIMARY KEY (id),
+      UNIQUE KEY name (name)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8
+  `);
+
+  setInterval(() => {
+    db.query(`
+      DELETE FROM images
+        WHERE (date_created < UTC_TIMESTAMP - INTERVAL 1 WEEK AND date_used IS NULL)
+        OR (date_used < UTC_TIMESTAMP - INTERVAL 1 MONTH)
+    `);
+  }, 3600 * 1000);
+
+  app.param('image', (req, res, next, image) => {
+    if (!image.match(/\.(png|jpg)$/i)) {
+      return res.status(403).end();
+    }
+
+    db.query("SELECT * FROM images WHERE name = ?", [image], (err, images) => {
+      if (err || !images.length) {
+        return res.status(404).end();
+      }
+
+      req.image = images[0];
+
+      return next();
+    });
+  });
+
+  app.post('/uploads/:name', bodyparser.raw({
+    limit: '10mb',
+    type: 'image/*'
+  }), (req, res) => {
+    db.query("INSERT INTO images SET ?", {
+      name: req.params.name,
+      size: req.body.length,
+      data: req.body
+    }, (err) => {
+      if (err) {
+        return res.send({ status: 'error', code: err.code });
+      }
+
+      res.send({ status: 'ok', size: req.body.length });
+    });
+  });
+
+  app.head('/uploads/:image', (req, res) => {
+    return res.status(200).end();
+  });
+
+  app.get("/uploads/:image", (req, res) => {
+    let image = sharp(req.image.data);
+
+    let width = +req.query.width;
+    let height = +req.query.height;
+    let blur = +req.query.blur;
+    let sharpen = +req.query.sharpen;
+    let greyscale = ['y', 'yes', '1', 'on'].includes(req.query.greyscale);
+    let flip = ['y', 'yes', '1', 'on'].includes(req.query.flip);
+    let flop = ['y', 'yes', '1', 'on'].includes(req.query.flop);
+
+    if (width > 0 && height > 0) {
+      image.ignoreAspectRatio();
+    }
+
+    if (width > 0 || height > 0) {
+      image.resize(width || null, height || null);
+    }
+
+    if (flip) image.flip();
+    if (flop) image.flop();
+    if (blur > 0) image.blur(blur);
+    if (sharpen > 0) image.sharpen(sharpen);
+    if (greyscale) image.greyscale();
+
+    db.query("UPDATE images SET date_used = UTC_TIMESTAMP WHERE id = ?", [req.image.id]);
+
+    res.setHeader('Content-Type', 'image/' + path.extname(req.image.name).substr(1));
+
+    image.pipe(res);
+  });
+
+  app.delete('/uploads/:image', (req, res) => {
+    db.query('DELETE FROM images WHERE id = ?', [req.image.id], (err) => {
+      return res.status(err ? 500 : 200).end();
+    });
+  });
+
+  app.get('/stats', (req, res) => {
+    db.query(`
+      SELECT
+        COUNT(*) total,
+        SUM(size) size,
+        MAX(date_created) last_created
+      FROM images
+    `, (err, rows) => {
+      if (err) {
+        return res.status(500).end();
+      }
+
+      rows[0].uptime = process.uptime();
+
+      return res.send(rows[0]);
+    });
+  })
+
+  app.listen(3000, () => {
+    console.log('app: ready');
+  });
+})
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/4/mysql/package.json b/node/wikibooks-nodejs-microservice/4/mysql/package.json
new file mode 100644
index 0000000000..b73601350b
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/4/mysql/package.json
@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "express": "^4.17.1",
+    "mysql": "^2.17.1",
+    "sharp": "^0.19.0"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/4/mysql/settings.json b/node/wikibooks-nodejs-microservice/4/mysql/settings.json
new file mode 100644
index 0000000000..dc44d360b6
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/4/mysql/settings.json
@@ -0,0 +1,3 @@
+{
+	"db": "mysql://root@localhost/imagini"
+}
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/4/redis/example.png b/node/wikibooks-nodejs-microservice/4/redis/example.png
new file mode 100644
index 0000000000..fd4089b315
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diff --git a/node/wikibooks-nodejs-microservice/4/redis/imagini.js b/node/wikibooks-nodejs-microservice/4/redis/imagini.js
new file mode 100644
index 0000000000..a0032272a7
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/4/redis/imagini.js
@@ -0,0 +1,88 @@
+const express = require('express');
+const sharp = require('sharp');
+const bodyparser = require('body-parser');
+const path = require('path');
+const redis = require('redis');
+const db = redis.createClient();
+const app = express();
+
+db.on('connect', () => {
+  console.log('db: ready');
+
+  app.post('/uploads/:name', bodyparser.raw({
+    limit: '10mb',
+    type: 'image/*'
+  }), (req, res) => {
+    db.hmset(req.params.name, {
+      size: req.body.length,
+      data: req.body.toString('base64')
+    }, (err) => {
+      if (err) {
+        return res.send({ status: 'error', code: err.code });
+      }
+
+      res.send({ status: 'ok', size: req.body.length });
+    });
+  });
+
+  app.param('image', (req, res, next, name) => {
+    if (!name.match(/\.(png|jpg)$/i)) {
+      return res.status(req.method === 'POST' ? 403 : 404).end();
+    }
+
+    db.hgetall(name, (err, image) => {
+      if (err || !image) return res.status(404).end();
+
+      req.image = image;
+      req.image.name = name;
+
+      return next();
+    });
+  });
+
+  app.head('/uploads/:image', (req, res) => {
+    return res.status(200).end();
+  });
+
+  app.get("/uploads/:image", (req, res) => {
+    let image = sharp(Buffer.from(req.image.data, 'base64'));
+
+    let width = +req.query.width;
+    let height = +req.query.height;
+    let blur = +req.query.blur;
+    let sharpen = +req.query.sharpen;
+    let greyscale = ['y', 'yes', '1', 'on'].includes(req.query.greyscale);
+    let flip = ['y', 'yes', '1', 'on'].includes(req.query.flip);
+    let flop = ['y', 'yes', '1', 'on'].includes(req.query.flop);
+
+    if (width > 0 && height > 0) {
+      image.ignoreAspectRatio();
+    }
+
+    if (width > 0 || height > 0) {
+      image.resize(width || null, height || null);
+    }
+
+    if (flip) image.flip();
+    if (flop) image.flop();
+    if (blur > 0) image.blur(blur);
+    if (sharpen > 0) image.sharpen(sharpen);
+    if (greyscale) image.greyscale();
+
+    db.hset(req.image.name, 'date_used', Date.now());
+
+    res.setHeader('Content-Type', 'image/' + path.extname(req.image.name).substr(1));
+
+    image.pipe(res);
+  });
+
+  app.delete('/uploads/:image', (req, res) => {
+    db.del(req.image.name, (err) => {
+      return res.status(err ? 500 : 200).end();
+    })
+  });
+
+  app.listen(3000, () => {
+    console.log('app: ready');
+  });
+});
diff --git a/node/wikibooks-nodejs-microservice/4/redis/package.json b/node/wikibooks-nodejs-microservice/4/redis/package.json
new file mode 100644
index 0000000000..7b0c2fe046
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/4/redis/package.json
@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "express": "^4.17.1",
+    "redis": "^2.8.0",
+    "sharp": "^0.19.0"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/4/rethinkdb/example.png b/node/wikibooks-nodejs-microservice/4/rethinkdb/example.png
new file mode 100644
index 0000000000..fd4089b315
Binary files /dev/null and b/node/wikibooks-nodejs-microservice/4/rethinkdb/example.png differ
diff --git a/node/wikibooks-nodejs-microservice/4/rethinkdb/imagini.js b/node/wikibooks-nodejs-microservice/4/rethinkdb/imagini.js
new file mode 100644
index 0000000000..ba2df15b1c
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/4/rethinkdb/imagini.js
@@ -0,0 +1,133 @@
+const settings = require('./settings');
+const express = require('express');
+const sharp = require('sharp');
+const bodyparser = require('body-parser');
+const path = require('path');
+const rethinkdb = require('rethinkdb');
+const app = express();
+
+rethinkdb.connect(settings.db, (err, db) => {
+  if (err) throw err;
+
+  console.log('db: ready');
+
+  rethinkdb.tableList().run(db, (err, tables) => {
+    if (err) throw err;
+
+    if (!tables.includes('images')) {
+      rethinkdb.tableCreate('images').run(db);
+    }
+  });
+
+  setInterval(() => {
+    let expiration = Date.now() - (30 * 86400 * 1000);
+
+    rethinkdb.table('images').filter((image) => {
+      return image('date_used').lt(expiration);
+    }).delete().run(db);
+  }, 3600 * 1000);
+
+  app.param('image', (req, res, next, image) => {
+    if (!image.match(/\.(png|jpg)$/i)) {
+      return res.status(403).end();
+    }
+
+    rethinkdb.table('images').filter({
+      name: image
+    }).limit(1).run(db, (err, images) => {
+      if (err) throw res.status(404).end();
+
+      images.toArray((err, images) => {
+        if (err) return res.status(500).end();
+        if (!images.length) return res.status(404).end();
+
+        req.image = images[0];
+
+        return next();
+      });
+    });
+  });
+
+  app.post('/uploads/:name', bodyparser.raw({
+    limit: '10mb',
+    type: 'image/*'
+  }), (req, res) => {
+    rethinkdb.table('images').insert({
+      name: req.params.name,
+      size: req.body.length,
+      data: req.body
+    }).run(db, (err) => {
+      if (err) {
+        return res.send({ status: 'error', code: err.code });
+      }
+
+      res.send({ status: 'ok', size: req.body.length });
+    });
+  });
+
+  app.head('/uploads/:image', (req, res) => {
+    return res.status(200).end();
+  });
+
+  app.get("/uploads/:image", (req, res) => {
+    let image = sharp(req.image.data);
+
+    let width = +req.query.width;
+    let height = +req.query.height;
+    let blur = +req.query.blur;
+    let sharpen = +req.query.sharpen;
+    let greyscale = ['y', 'yes', '1', 'on'].includes(req.query.greyscale);
+    let flip = ['y', 'yes', '1', 'on'].includes(req.query.flip);
+    let flop = ['y', 'yes', '1', 'on'].includes(req.query.flop);
+
+    if (width > 0 && height > 0) {
+      image.ignoreAspectRatio();
+    }
+
+    if (width > 0 || height > 0) {
+      image.resize(width || null, height || null);
+    }
+
+    if (flip) image.flip();
+    if (flop) image.flop();
+    if (blur > 0) image.blur(blur);
+    if (sharpen > 0) image.sharpen(sharpen);
+    if (greyscale) image.greyscale();
+
+    rethinkdb.table('images').get(req.image.id).update({ date_used: Date.now() }).run(db);
+
+    res.setHeader('Content-Type', 'image/' + path.extname(req.image.name).substr(1));
+
+    image.pipe(res);
+  });
+
+  app.delete('/uploads/:image', (req, res) => {
+    rethinkdb.table('images').get(req.image.id).delete().run(db, (err) => {
+      return res.status(err ? 500 : 200).end();
+    });
+  });
+
+  app.get('/stats', (req, res) => {
+    let uptime = process.uptime();
+
+    rethinkdb.table('images').count().run(db, (err, total) => {
+      if (err) return res.status(500).end();
+
+      rethinkdb.table('images').sum('size').run(db, (err, size) => {
+        if (err) return res.status(500).end();
+
+        rethinkdb.table('images').max('date_used').run(db, (err, last_used) => {
+          if (err) return res.status(500).end();
+
+          last_used = (last_used ? new Date(last_used.date_used) : null);
+
+          return res.send({ total, size, last_used, uptime });
+        });
+      });
+    });
+  });
+
+  app.listen(3000, () => {
+    console.log('app: ready');
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/4/rethinkdb/package.json b/node/wikibooks-nodejs-microservice/4/rethinkdb/package.json
new file mode 100644
index 0000000000..77f2d973d2
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/4/rethinkdb/package.json
@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "express": "^4.17.1",
+    "rethinkdb": "^2.3.3",
+    "sharp": "^0.19.0"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/4/rethinkdb/settings.json b/node/wikibooks-nodejs-microservice/4/rethinkdb/settings.json
new file mode 100644
index 0000000000..559c40c0c0
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/4/rethinkdb/settings.json
@@ -0,0 +1,6 @@
+{
+  "db": {
+    "host": "localhost",
+    "db": "imagini"
+  }
+}
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/.gitignore b/node/wikibooks-nodejs-microservice/5/.gitignore
new file mode 100644
index 0000000000..2b7cecf776
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/.gitignore
@@ -0,0 +1,2 @@
+.nyc_output
+coverage
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/description.md b/node/wikibooks-nodejs-microservice/5/description.md
new file mode 100644
index 0000000000..ad766b28fe
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/description.md
@@ -0,0 +1,5 @@
+## 5 - 3 - 2 코드 커버리지 추가
+
+- `npx nyc npm test`
+
+- `npx nyc report --reporter=html`
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/imagini.js b/node/wikibooks-nodejs-microservice/5/imagini.js
new file mode 100644
index 0000000000..05bcd60aee
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/imagini.js
@@ -0,0 +1,141 @@
+const settings = require('./settings');
+const mysql = require('mysql');
+const db = mysql.createConnection(settings.db);
+const express = require('express');
+const sharp = require('sharp');
+const bodyparser = require('body-parser');
+const path = require('path');
+const app = express();
+
+app.db = db;
+
+db.connect((err) => {
+  if (err) throw err;
+
+  db.query(`
+    CREATE TABLE IF NOT EXISTS images
+    (
+        id           INT(11)      UNSIGNED NOT NULL AUTO_INCREMENT,
+        date_created TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        date_used    TIMESTAMP    NULL DEFAULT NULL,
+        name         VARCHAR(300) NOT NULL,
+        size         INT(11)      UNSIGNED NOT NULL,
+        data         LONGBLOB     NOT NULL,
+      PRIMARY KEY (id),
+      UNIQUE KEY name (name)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8
+  `);
+
+  setInterval(() => {
+    db.query(`
+      DELETE FROM images
+        WHERE (date_created < UTC_TIMESTAMP - INTERVAL 1 WEEK AND date_used IS NULL)
+        OR (date_used < UTC_TIMESTAMP - INTERVAL 1 MONTH)
+    `);
+  }, 3600 * 1000);
+
+  app.param('image', (req, res, next, image) => {
+    if (!image.match(/\.(png|jpg)$/i)) {
+      return res.status(403).end();
+    }
+
+    db.query("SELECT * FROM images WHERE name = ?", [image], (err, images) => {
+      if (err || !images.length) {
+        return res.status(404).end();
+      }
+
+      req.image = images[0];
+
+      return next();
+    });
+  });
+
+  app.post('/uploads/:name', bodyparser.raw({
+    limit: '10mb',
+    type: 'image/*'
+  }), (req, res) => {
+    db.query("INSERT INTO images SET ?", {
+      name: req.params.name,
+      size: req.body.length,
+      data: req.body
+    }, (err) => {
+      if (err) {
+        return res.send({ status: 'error', code: err.code });
+      }
+
+      res.send({ status: 'ok', size: req.body.length });
+    });
+  });
+
+  app.head('/uploads/:image', (req, res) => {
+    return res.status(200).end();
+  });
+
+  app.get("/uploads/:image", (req, res) => {
+    if (Object.keys(req.query).length === 0) {
+      db.query("UPDATE images SET date_used = UTC_TIMESTAMP WHERE id = ?", [req.image.id]);
+
+      res.setHeader("Content-Type", "image/" + path.extname(req.image.name).substr(1));
+
+      return res.end(req.image.data);
+    }
+
+    let image = sharp(req.image.data);
+
+    let width = +req.query.width;
+    let height = +req.query.height;
+    let blur = +req.query.blur;
+    let sharpen = +req.query.sharpen;
+    let greyscale = ['y', 'yes', '1', 'on'].includes(req.query.greyscale);
+    let flip = ['y', 'yes', '1', 'on'].includes(req.query.flip);
+    let flop = ['y', 'yes', '1', 'on'].includes(req.query.flop);
+
+    if (width > 0 && height > 0) {
+      image.ignoreAspectRatio();
+    }
+
+    if (width > 0 || height > 0) {
+      image.resize(width || null, height || null);
+    }
+
+    if (flip) image.flip();
+    if (flop) image.flop();
+    if (blur > 0) image.blur(blur);
+    if (sharpen > 0) image.sharpen(sharpen);
+    if (greyscale) image.greyscale();
+
+    db.query("UPDATE images SET date_used = UTC_TIMESTAMP WHERE id = ?", [req.image.id]);
+
+    res.setHeader('Content-Type', 'image/' + path.extname(req.image.name).substr(1));
+
+    image.pipe(res);
+  });
+
+  app.delete('/uploads/:image', (req, res) => {
+    db.query('DELETE FROM images WHERE id = ?', [req.image.id], (err) => {
+      return res.status(err ? 500 : 200).end();
+    });
+  });
+
+  app.get('/stats', (req, res) => {
+    db.query(`
+      SELECT
+        COUNT(*) total,
+        SUM(size) size,
+        MAX(date_used) last_used
+      FROM images
+    `, (err, rows) => {
+      if (err) {
+        return res.status(500).end();
+      }
+
+      rows[0].uptime = process.uptime();
+
+      return res.send(rows[0]);
+    });
+  })
+
+  app.listen(3000);
+})
+
+module.exports = app;
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/package.json b/node/wikibooks-nodejs-microservice/5/package.json
new file mode 100644
index 0000000000..bfc367cc9e
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/package.json
@@ -0,0 +1,17 @@
+{
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "express": "^4.17.1",
+    "mysql": "^2.17.1",
+    "sharp": "^0.19.0"
+  },
+  "devDependencies": {
+    "chai": "^4.2.0",
+    "chai-http": "^4.3.0",
+    "mocha": "^6.2.0",
+    "sinon": "^7.4.2"
+  },
+  "scripts": {
+    "test": "node test/run"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/5/settings.json b/node/wikibooks-nodejs-microservice/5/settings.json
new file mode 100644
index 0000000000..88afb918a1
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/settings.json
@@ -0,0 +1,3 @@
+{
+  "db": "mysql://root@localhost/imagini"
+}
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/test/integration/image-check.js b/node/wikibooks-nodejs-microservice/5/test/integration/image-check.js
new file mode 100644
index 0000000000..bd77bc72da
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/test/integration/image-check.js
@@ -0,0 +1,48 @@
+const chai = require('chai');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Checking image', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_check.png')
+      .end(() => {
+        return done();
+      });
+  });
+
+  it("should return 404 if it doesn't exist", (done) => {
+    chai
+      .request(tools.service)
+      .head('/uploads/test_image_check.png')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(404);
+
+        return done();
+      });
+  });
+
+  it('should return 200 if it exists', (done) => {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_check.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        chai
+          .request(tools.service)
+          .head('/uploads/test_image_check.png')
+          .end((err, res) => {
+            chai.expect(res).to.have.status(200);
+
+            return done();
+          });
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/test/integration/image-delete-old.js b/node/wikibooks-nodejs-microservice/5/test/integration/image-delete-old.js
new file mode 100644
index 0000000000..1c7b55bfdf
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/test/integration/image-delete-old.js
@@ -0,0 +1,24 @@
+const chai = require('chai');
+const sinon = require('sinon');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Deleting older image', () => {
+  let clock = sinon.useFakeTimers({ shouldAdvanceTime: true });
+
+  it('should run every hour', (done) => {
+    chai
+      .request(tools.service)
+      .get('/stats')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+        clock.tick(3600 * 1000);
+        clock.restore();
+
+        return done();
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/test/integration/image-delete.js b/node/wikibooks-nodejs-microservice/5/test/integration/image-delete.js
new file mode 100644
index 0000000000..659ee556de
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/test/integration/image-delete.js
@@ -0,0 +1,70 @@
+const chai = require('chai');
+const sinon = require('sinon');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Deleting image', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_delete.png')
+      .end(() => {
+        return done();
+      });
+  });
+
+  it('should return 200 if it exists', (done) => {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_delete.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        chai
+          .request(tools.service)
+          .delete('/uploads/test_image_delete.png')
+          .end((err, res) => {
+            chai.expect(res).to.have.status(200);
+
+            return done();
+          });
+      });
+  });
+
+  it('should return 500 if it exists', (done) => {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_delete.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        let query = sinon.stub(tools.service.db, 'query');
+
+        query
+          .withArgs('DELETE FROM images WHERE id = ?')
+          .callsArgWithAsync(2, new Error('Fake'));
+
+        query
+          .callThrough();
+
+        chai
+          .request(tools.service)
+          .delete('/uploads/test_image_delete.png')
+          .end((err, res) => {
+            chai.expect(res).to.have.status(500);
+
+            query.restore();
+
+            return done();
+          });
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/test/integration/image-download.js b/node/wikibooks-nodejs-microservice/5/test/integration/image-download.js
new file mode 100644
index 0000000000..fddeba2d78
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/test/integration/image-download.js
@@ -0,0 +1,109 @@
+const chai = require('chai');
+const http = require('chai-http');
+const tools = require('../tools');
+const sharp = require('sharp');
+
+chai.use(http);
+
+describe('Downloading image', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_download.png')
+      .end(() => {
+        chai
+          .request(tools.service)
+          .post('/uploads/test_image_download.png')
+          .set('Content-Type', 'image/png')
+          .send(tools.sample)
+          .end((err, res) => {
+            chai.expect(res).to.have.status(200);
+            chai.expect(res.body).to.have.status('ok');
+
+            return done();
+          });
+      });
+  });
+
+  it('should return the original image size if no parameters given', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_download.png')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.length(tools.sample.length);
+
+        return done();
+      });
+  });
+
+  it('should be able to resize the image as we request', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_download.png?width=200&height=100')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+
+        let image = sharp(res.body);
+
+        image
+          .metadata()
+          .then((metadata) => {
+            chai.expect(metadata).to.have.property('width', 200);
+            chai.expect(metadata).to.have.property('height', 100);
+
+            return done();
+          });
+      });
+  });
+
+  it("should be able to resize the image width as we request", (done) => {
+    chai
+      .request(tools.service)
+      .get("/uploads/test_image_download.png?width=200")
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+        let image = sharp(res.body);
+
+        image
+          .metadata()
+          .then((metadata) => {
+            chai.expect(metadata).to.have.property("width", 200);
+
+            return done();
+          });
+      });
+  });
+
+  it("should be able to resize the image height as we request", (done) => {
+    chai
+      .request(tools.service)
+      .get("/uploads/test_image_download.png?height=100")
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+        let image = sharp(res.body);
+
+        image
+          .metadata()
+          .then((metadata) => {
+            chai.expect(metadata).to.have.property("height", 100);
+
+            return done();
+          });
+      });
+  });
+
+  it('should be able add image effects as we request', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_download.png?flip=y&flop=y&greyscale=y&blur=10&sharpen=10')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+        return done();
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/test/integration/image-parameter.js b/node/wikibooks-nodejs-microservice/5/test/integration/image-parameter.js
new file mode 100644
index 0000000000..55754bdd1f
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/test/integration/image-parameter.js
@@ -0,0 +1,38 @@
+const chai = require('chai');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('The image parameter', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_upload.png')
+      .end(() => {
+        return done();
+      });
+  });
+
+  it('should reply 403 fro non image extension', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_paramter.txt')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(403);
+
+        return done();
+      });
+  });
+
+  it('should reply 404 for non image existence', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_parameter.png')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(404);
+
+        return done();
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/test/integration/image-stats.js b/node/wikibooks-nodejs-microservice/5/test/integration/image-stats.js
new file mode 100644
index 0000000000..80e0c106a1
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/test/integration/image-stats.js
@@ -0,0 +1,51 @@
+const chai = require('chai');
+const sinon = require('sinon');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Statistics', () => {
+  it('should return an object with total, size, last_used and uptime', (done) => {
+    chai
+      .request(tools.service)
+      .get('/stats')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.property('total');
+        chai.expect(res.body).to.have.property('size');
+        chai.expect(res.body).to.have.property('last_used');
+        chai.expect(res.body).to.have.property('uptime');
+
+        return done();
+      });
+  });
+
+  it('should return 500 if a database error happens', (done) => {
+    let query = sinon.stub(tools.service.db, 'query');
+
+    query
+      .withArgs(`
+      SELECT
+        COUNT(*) total,
+        SUM(size) size,
+        MAX(date_used) last_used
+      FROM images
+    `)
+      .callsArgWithAsync(1, new Error('Fake'));
+
+    query
+      .callThrough();
+
+    chai
+      .request(tools.service)
+      .get('/stats')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(500);
+
+        query.restore();
+
+        return done();
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/test/integration/image-upload.js b/node/wikibooks-nodejs-microservice/5/test/integration/image-upload.js
new file mode 100644
index 0000000000..5eb1f0dc05
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/test/integration/image-upload.js
@@ -0,0 +1,56 @@
+const chai = require('chai');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Uploading image', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_upload.png')
+      .end(() => {
+        return done();
+      });
+  });
+
+  it('should accept a PNG images', function (done) {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_upload.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        return done();
+      });
+  });
+
+  it('should deny duplicated images', (done) => {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_upload.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        chai
+          .request(tools.service)
+          .post('/uploads/test_image_upload.png')
+          .set('Content-Type', 'image/png')
+          .send(tools.sample)
+          .end((err, res) => {
+            chai.expect(res).to.have.status(200);
+            chai.expect(res.body).to.have.status('error');
+            chai.expect(res.body).to.have.property('code', 'ER_DUP_ENTRY');
+
+            return done();
+          });
+
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/test/run.js b/node/wikibooks-nodejs-microservice/5/test/run.js
new file mode 100644
index 0000000000..5a97128391
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/test/run.js
@@ -0,0 +1,17 @@
+const fs = require('fs');
+const path = require('path');
+const mocha = require('mocha');
+const suite = new mocha();
+
+fs.readdir(path.join(__dirname, 'integration'), (err, files) => {
+  if (err) throw err;
+
+  files.filter((filename) => (filename.match(/\.js$/)))
+    .map((filename) => {
+      suite.addFile(path.join(__dirname, 'integration', filename));
+    });
+
+  suite.run((failures) => {
+    process.exit(failures);
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/5/test/sample.png b/node/wikibooks-nodejs-microservice/5/test/sample.png
new file mode 100644
index 0000000000..fd4089b315
Binary files /dev/null and b/node/wikibooks-nodejs-microservice/5/test/sample.png differ
diff --git a/node/wikibooks-nodejs-microservice/5/test/tools.js b/node/wikibooks-nodejs-microservice/5/test/tools.js
new file mode 100644
index 0000000000..cdc9096b3c
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/5/test/tools.js
@@ -0,0 +1,5 @@
+const fs = require('fs');
+const path = require('path');
+
+exports.service = require('../imagini.js');
+exports.sample = fs.readFileSync(path.join(__dirname, 'sample.png'));
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/.gitignore b/node/wikibooks-nodejs-microservice/6/.gitignore
new file mode 100644
index 0000000000..0ac6e33b12
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/.gitignore
@@ -0,0 +1,3 @@
+.nyc_output
+coverage
+mysql
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/Dockerfile b/node/wikibooks-nodejs-microservice/6/Dockerfile
new file mode 100644
index 0000000000..87bfd51b41
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/Dockerfile
@@ -0,0 +1,13 @@
+FROM node:10
+MAINTAINER neverlish
+
+ADD imagini/imagini.js /opt/app/imagini.js
+ADD imagini/package.json /opt/app/package.json
+ADD imagini/settings.json /opt/app/settings.json
+
+WORKDIR /opt/app
+RUN npm i
+
+EXPOSE 3000
+
+CMD ["node", "/opt/app/imagini"]
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/description.md b/node/wikibooks-nodejs-microservice/6/description.md
new file mode 100644
index 0000000000..c2ab5dcdc1
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/description.md
@@ -0,0 +1,30 @@
+## 6 - 3 도커를 사용한 배포 - 2 도커파일 정의
+
+- `docker pull node:alpine`
+- `docker build -t imagini:0.0.1 .`
+- `docker run -i -t imagini:0.0.1 sh`
+- `docker run -v $(pwd)/settings.json:/opt/app/settings.json imagini:0.0.1`
+
+## 6 - 3 - 3 컨테이너 관리
+- `time docker stop CONTAINER_ID`
+- `docker run -d -p 80:3000 -v $(pwd)/settings.json:/opt/app/settings.json imagini:0.0.1`
+
+## 6 - 3 - 4 컨테이너 정리
+- `docker rm $(docker ps -qa)`
+- `docker rmi $(docker images -q)`
+
+## 6 - 4 MySQL 배포
+- `docker network create imagini`
+- `docker network ls`
+- `docker run --name imagini-database --network imagini -v $(pwd)/mysql:/var/lib/mysql -e MYSQL_DATABASE=imagini -e MYSQL_ROOT_PASSWORD=secret -d mysql:5.7`
+- `docker run --rm -t -i --network imagini node:latest bash`
+  - `# ping imagini-database -c 5`
+- `docker run --name imagini-service --network imagini -p 80:3000 -d -v $(pwd)/settings.json:/opt/app/settings.json imagini:0.0.1`
+
+## 6 - 5 도커 컴포즈 사용
+- `docker-compose up -d`
+
+## 6 - 5 - 1 도커 컴포즈 고급 활용
+- `docker-compose logs service`
+- `docker-compose ps`
+- `docker-compose down`
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/docker-compose.yml b/node/wikibooks-nodejs-microservice/6/docker-compose.yml
new file mode 100644
index 0000000000..2feb24f7b7
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/docker-compose.yml
@@ -0,0 +1,22 @@
+version: "3"
+networks:
+  imagini:
+services:
+  database:
+    image: mysql:5.7
+    networks:
+    - imagini
+    volumes:
+    - ${PWD}/mysql:/var/lib/mysql
+    environment:
+      MYSQL_DATABASE: imagini
+      MYSQL_ROOT_PASSWORD: secret
+  service:
+    image: imagini:0.0.1
+    networks:
+    - imagini
+    volumes:
+    - ${PWD}/settings.json:/opt/app/settings.json
+    ports:
+    - "80:3000"
+    restart: on-failure
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/description.md b/node/wikibooks-nodejs-microservice/6/imagini/description.md
new file mode 100644
index 0000000000..ad766b28fe
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/description.md
@@ -0,0 +1,5 @@
+## 5 - 3 - 2 코드 커버리지 추가
+
+- `npx nyc npm test`
+
+- `npx nyc report --reporter=html`
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/imagini.js b/node/wikibooks-nodejs-microservice/6/imagini/imagini.js
new file mode 100644
index 0000000000..a4f68e2840
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/imagini.js
@@ -0,0 +1,149 @@
+const settings = require('./settings');
+const mysql = require('mysql');
+const db = mysql.createConnection(settings.db);
+const express = require('express');
+const sharp = require('sharp');
+const bodyparser = require('body-parser');
+const path = require('path');
+const app = express();
+
+app.db = db;
+
+db.connect((err) => {
+  if (err) throw err;
+
+  db.query(`
+    CREATE TABLE IF NOT EXISTS images
+    (
+        id           INT(11)      UNSIGNED NOT NULL AUTO_INCREMENT,
+        date_created TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP,
+        date_used    TIMESTAMP    NULL DEFAULT NULL,
+        name         VARCHAR(300) NOT NULL,
+        size         INT(11)      UNSIGNED NOT NULL,
+        data         LONGBLOB     NOT NULL,
+      PRIMARY KEY (id),
+      UNIQUE KEY name (name)
+    ) ENGINE=InnoDB DEFAULT CHARSET=utf8
+  `);
+
+  setInterval(() => {
+    db.query(`
+      DELETE FROM images
+        WHERE (date_created < UTC_TIMESTAMP - INTERVAL 1 WEEK AND date_used IS NULL)
+        OR (date_used < UTC_TIMESTAMP - INTERVAL 1 MONTH)
+    `);
+  }, 3600 * 1000);
+
+  app.param('image', (req, res, next, image) => {
+    if (!image.match(/\.(png|jpg)$/i)) {
+      return res.status(403).end();
+    }
+
+    db.query("SELECT * FROM images WHERE name = ?", [image], (err, images) => {
+      if (err || !images.length) {
+        return res.status(404).end();
+      }
+
+      req.image = images[0];
+
+      return next();
+    });
+  });
+
+  app.post('/uploads/:name', bodyparser.raw({
+    limit: '10mb',
+    type: 'image/*'
+  }), (req, res) => {
+    db.query("INSERT INTO images SET ?", {
+      name: req.params.name,
+      size: req.body.length,
+      data: req.body
+    }, (err) => {
+      if (err) {
+        return res.send({ status: 'error', code: err.code });
+      }
+
+      res.send({ status: 'ok', size: req.body.length });
+    });
+  });
+
+  app.head('/uploads/:image', (req, res) => {
+    return res.status(200).end();
+  });
+
+  app.get("/uploads/:image", (req, res) => {
+    if (Object.keys(req.query).length === 0) {
+      db.query("UPDATE images SET date_used = UTC_TIMESTAMP WHERE id = ?", [req.image.id]);
+
+      res.setHeader("Content-Type", "image/" + path.extname(req.image.name).substr(1));
+
+      return res.end(req.image.data);
+    }
+
+    let image = sharp(req.image.data);
+
+    let width = +req.query.width;
+    let height = +req.query.height;
+    let blur = +req.query.blur;
+    let sharpen = +req.query.sharpen;
+    let greyscale = ['y', 'yes', '1', 'on'].includes(req.query.greyscale);
+    let flip = ['y', 'yes', '1', 'on'].includes(req.query.flip);
+    let flop = ['y', 'yes', '1', 'on'].includes(req.query.flop);
+
+    if (width > 0 && height > 0) {
+      image.ignoreAspectRatio();
+    }
+
+    if (width > 0 || height > 0) {
+      image.resize(width || null, height || null);
+    }
+
+    if (flip) image.flip();
+    if (flop) image.flop();
+    if (blur > 0) image.blur(blur);
+    if (sharpen > 0) image.sharpen(sharpen);
+    if (greyscale) image.greyscale();
+
+    db.query("UPDATE images SET date_used = UTC_TIMESTAMP WHERE id = ?", [req.image.id]);
+
+    res.setHeader('Content-Type', 'image/' + path.extname(req.image.name).substr(1));
+
+    image.pipe(res);
+  });
+
+  app.delete('/uploads/:image', (req, res) => {
+    db.query('DELETE FROM images WHERE id = ?', [req.image.id], (err) => {
+      return res.status(err ? 500 : 200).end();
+    });
+  });
+
+  app.get('/stats', (req, res) => {
+    db.query(`
+      SELECT
+        COUNT(*) total,
+        SUM(size) size,
+        MAX(date_used) last_used
+      FROM images
+    `, (err, rows) => {
+      if (err) {
+        return res.status(500).end();
+      }
+
+      rows[0].uptime = process.uptime();
+
+      return res.send(rows[0]);
+    });
+  })
+
+  app.listen(3000, () => {
+    console.log('ready');
+  });
+
+  process.on('SIGTERM', () => {
+    db.end(() => {
+      process.exit(0);
+    });
+  });
+})
+
+module.exports = app;
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/package.json b/node/wikibooks-nodejs-microservice/6/imagini/package.json
new file mode 100644
index 0000000000..bfc367cc9e
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/package.json
@@ -0,0 +1,17 @@
+{
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "express": "^4.17.1",
+    "mysql": "^2.17.1",
+    "sharp": "^0.19.0"
+  },
+  "devDependencies": {
+    "chai": "^4.2.0",
+    "chai-http": "^4.3.0",
+    "mocha": "^6.2.0",
+    "sinon": "^7.4.2"
+  },
+  "scripts": {
+    "test": "node test/run"
+  }
+}
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/settings.json b/node/wikibooks-nodejs-microservice/6/imagini/settings.json
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-check.js b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-check.js
new file mode 100644
index 0000000000..bd77bc72da
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-check.js
@@ -0,0 +1,48 @@
+const chai = require('chai');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Checking image', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_check.png')
+      .end(() => {
+        return done();
+      });
+  });
+
+  it("should return 404 if it doesn't exist", (done) => {
+    chai
+      .request(tools.service)
+      .head('/uploads/test_image_check.png')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(404);
+
+        return done();
+      });
+  });
+
+  it('should return 200 if it exists', (done) => {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_check.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        chai
+          .request(tools.service)
+          .head('/uploads/test_image_check.png')
+          .end((err, res) => {
+            chai.expect(res).to.have.status(200);
+
+            return done();
+          });
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-delete-old.js b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-delete-old.js
new file mode 100644
index 0000000000..1c7b55bfdf
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-delete-old.js
@@ -0,0 +1,24 @@
+const chai = require('chai');
+const sinon = require('sinon');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Deleting older image', () => {
+  let clock = sinon.useFakeTimers({ shouldAdvanceTime: true });
+
+  it('should run every hour', (done) => {
+    chai
+      .request(tools.service)
+      .get('/stats')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+        clock.tick(3600 * 1000);
+        clock.restore();
+
+        return done();
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-delete.js b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-delete.js
new file mode 100644
index 0000000000..659ee556de
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-delete.js
@@ -0,0 +1,70 @@
+const chai = require('chai');
+const sinon = require('sinon');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Deleting image', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_delete.png')
+      .end(() => {
+        return done();
+      });
+  });
+
+  it('should return 200 if it exists', (done) => {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_delete.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        chai
+          .request(tools.service)
+          .delete('/uploads/test_image_delete.png')
+          .end((err, res) => {
+            chai.expect(res).to.have.status(200);
+
+            return done();
+          });
+      });
+  });
+
+  it('should return 500 if it exists', (done) => {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_delete.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        let query = sinon.stub(tools.service.db, 'query');
+
+        query
+          .withArgs('DELETE FROM images WHERE id = ?')
+          .callsArgWithAsync(2, new Error('Fake'));
+
+        query
+          .callThrough();
+
+        chai
+          .request(tools.service)
+          .delete('/uploads/test_image_delete.png')
+          .end((err, res) => {
+            chai.expect(res).to.have.status(500);
+
+            query.restore();
+
+            return done();
+          });
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-download.js b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-download.js
new file mode 100644
index 0000000000..fddeba2d78
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-download.js
@@ -0,0 +1,109 @@
+const chai = require('chai');
+const http = require('chai-http');
+const tools = require('../tools');
+const sharp = require('sharp');
+
+chai.use(http);
+
+describe('Downloading image', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_download.png')
+      .end(() => {
+        chai
+          .request(tools.service)
+          .post('/uploads/test_image_download.png')
+          .set('Content-Type', 'image/png')
+          .send(tools.sample)
+          .end((err, res) => {
+            chai.expect(res).to.have.status(200);
+            chai.expect(res.body).to.have.status('ok');
+
+            return done();
+          });
+      });
+  });
+
+  it('should return the original image size if no parameters given', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_download.png')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.length(tools.sample.length);
+
+        return done();
+      });
+  });
+
+  it('should be able to resize the image as we request', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_download.png?width=200&height=100')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+
+        let image = sharp(res.body);
+
+        image
+          .metadata()
+          .then((metadata) => {
+            chai.expect(metadata).to.have.property('width', 200);
+            chai.expect(metadata).to.have.property('height', 100);
+
+            return done();
+          });
+      });
+  });
+
+  it("should be able to resize the image width as we request", (done) => {
+    chai
+      .request(tools.service)
+      .get("/uploads/test_image_download.png?width=200")
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+        let image = sharp(res.body);
+
+        image
+          .metadata()
+          .then((metadata) => {
+            chai.expect(metadata).to.have.property("width", 200);
+
+            return done();
+          });
+      });
+  });
+
+  it("should be able to resize the image height as we request", (done) => {
+    chai
+      .request(tools.service)
+      .get("/uploads/test_image_download.png?height=100")
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+        let image = sharp(res.body);
+
+        image
+          .metadata()
+          .then((metadata) => {
+            chai.expect(metadata).to.have.property("height", 100);
+
+            return done();
+          });
+      });
+  });
+
+  it('should be able add image effects as we request', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_download.png?flip=y&flop=y&greyscale=y&blur=10&sharpen=10')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+
+        return done();
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-parameter.js b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-parameter.js
new file mode 100644
index 0000000000..55754bdd1f
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-parameter.js
@@ -0,0 +1,38 @@
+const chai = require('chai');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('The image parameter', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_upload.png')
+      .end(() => {
+        return done();
+      });
+  });
+
+  it('should reply 403 fro non image extension', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_paramter.txt')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(403);
+
+        return done();
+      });
+  });
+
+  it('should reply 404 for non image existence', (done) => {
+    chai
+      .request(tools.service)
+      .get('/uploads/test_image_parameter.png')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(404);
+
+        return done();
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-stats.js b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-stats.js
new file mode 100644
index 0000000000..80e0c106a1
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-stats.js
@@ -0,0 +1,51 @@
+const chai = require('chai');
+const sinon = require('sinon');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Statistics', () => {
+  it('should return an object with total, size, last_used and uptime', (done) => {
+    chai
+      .request(tools.service)
+      .get('/stats')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.property('total');
+        chai.expect(res.body).to.have.property('size');
+        chai.expect(res.body).to.have.property('last_used');
+        chai.expect(res.body).to.have.property('uptime');
+
+        return done();
+      });
+  });
+
+  it('should return 500 if a database error happens', (done) => {
+    let query = sinon.stub(tools.service.db, 'query');
+
+    query
+      .withArgs(`
+      SELECT
+        COUNT(*) total,
+        SUM(size) size,
+        MAX(date_used) last_used
+      FROM images
+    `)
+      .callsArgWithAsync(1, new Error('Fake'));
+
+    query
+      .callThrough();
+
+    chai
+      .request(tools.service)
+      .get('/stats')
+      .end((err, res) => {
+        chai.expect(res).to.have.status(500);
+
+        query.restore();
+
+        return done();
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-upload.js b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-upload.js
new file mode 100644
index 0000000000..5eb1f0dc05
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/test/integration/image-upload.js
@@ -0,0 +1,56 @@
+const chai = require('chai');
+const http = require('chai-http');
+const tools = require('../tools');
+
+chai.use(http);
+
+describe('Uploading image', () => {
+  beforeEach((done) => {
+    chai
+      .request(tools.service)
+      .delete('/uploads/test_image_upload.png')
+      .end(() => {
+        return done();
+      });
+  });
+
+  it('should accept a PNG images', function (done) {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_upload.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        return done();
+      });
+  });
+
+  it('should deny duplicated images', (done) => {
+    chai
+      .request(tools.service)
+      .post('/uploads/test_image_upload.png')
+      .set('Content-Type', 'image/png')
+      .send(tools.sample)
+      .end((err, res) => {
+        chai.expect(res).to.have.status(200);
+        chai.expect(res.body).to.have.status('ok');
+
+        chai
+          .request(tools.service)
+          .post('/uploads/test_image_upload.png')
+          .set('Content-Type', 'image/png')
+          .send(tools.sample)
+          .end((err, res) => {
+            chai.expect(res).to.have.status(200);
+            chai.expect(res.body).to.have.status('error');
+            chai.expect(res.body).to.have.property('code', 'ER_DUP_ENTRY');
+
+            return done();
+          });
+
+      });
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/run.js b/node/wikibooks-nodejs-microservice/6/imagini/test/run.js
new file mode 100644
index 0000000000..5a97128391
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/test/run.js
@@ -0,0 +1,17 @@
+const fs = require('fs');
+const path = require('path');
+const mocha = require('mocha');
+const suite = new mocha();
+
+fs.readdir(path.join(__dirname, 'integration'), (err, files) => {
+  if (err) throw err;
+
+  files.filter((filename) => (filename.match(/\.js$/)))
+    .map((filename) => {
+      suite.addFile(path.join(__dirname, 'integration', filename));
+    });
+
+  suite.run((failures) => {
+    process.exit(failures);
+  });
+});
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/sample.png b/node/wikibooks-nodejs-microservice/6/imagini/test/sample.png
new file mode 100644
index 0000000000..fd4089b315
Binary files /dev/null and b/node/wikibooks-nodejs-microservice/6/imagini/test/sample.png differ
diff --git a/node/wikibooks-nodejs-microservice/6/imagini/test/tools.js b/node/wikibooks-nodejs-microservice/6/imagini/test/tools.js
new file mode 100644
index 0000000000..cdc9096b3c
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/imagini/test/tools.js
@@ -0,0 +1,5 @@
+const fs = require('fs');
+const path = require('path');
+
+exports.service = require('../imagini.js');
+exports.sample = fs.readFileSync(path.join(__dirname, 'sample.png'));
\ No newline at end of file
diff --git a/node/wikibooks-nodejs-microservice/6/settings.json b/node/wikibooks-nodejs-microservice/6/settings.json
new file mode 100644
index 0000000000..94b05b1985
--- /dev/null
+++ b/node/wikibooks-nodejs-microservice/6/settings.json
@@ -0,0 +1,3 @@
+{
+  "db": "mysql://root:secret@database/imagini"
+}
\ No newline at end of file