diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 00000000..6a0d87ef
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,2 @@
+node_modules
+.env*
diff --git a/.env.sample b/.env.sample
new file mode 100644
index 00000000..1e593430
--- /dev/null
+++ b/.env.sample
@@ -0,0 +1 @@
+SQL_GENERATE_URL=postgres://sql-url
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 999f0788..0eaf48df 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -97,11 +97,3 @@ jobs:
       - uses: oven-sh/setup-bun@v2
       - run: bun prepare:deploy:web
       - run: test `ls web/.next | wc -l` != 0
-
-  deploy-test-server:
-    name: Deploy Test (server)
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: oven-sh/setup-bun@v2
-      - run: bun prepare:deploy:server
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
new file mode 100644
index 00000000..1cd25f63
--- /dev/null
+++ b/.github/workflows/deploy.yml
@@ -0,0 +1,17 @@
+name: Deploy
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    name: Deploy Server to Fly.io
+    runs-on: ubuntu-latest
+    env:
+      SQL_GENERATE_URL: ${{ secrets.DATABASE_URL_FOR_PRISMA_SQL_GENERATION }}
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: superfly/flyctl-actions/setup-flyctl@master
+      - run: flyctl deploy --build-arg SQL_GENERATE_URL=$SQL_GENERATE_URL --access-token "${{ secrets.FLY_DEPLOY_TOKEN }}"
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 00000000..80b12fec
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,33 @@
+# syntax = docker/dockerfile:1
+
+ARG BUN_VERSION=1.2.2
+FROM oven/bun:${BUN_VERSION} AS base
+LABEL fly_launch_runtime="Bun/Prisma"
+ENV NODE_ENV="production"
+
+# Throw-away build stage to reduce size of final image
+FROM base AS build
+
+WORKDIR /build
+ARG SQL_GENERATE_URL
+RUN test -n "${SQL_GENERATE_URL}"
+ENV DATABASE_URL=$SQL_GENERATE_URL
+ENV DIRECT_URL=$SQL_GENERATE_URL
+COPY . .
+RUN --mount=type=cache,target=~/.bun/install bun install --frozen-lockfile --ignore-scripts
+RUN cd server; bun prisma generate --sql
+RUN cd server; bun run :build
+
+
+# Final stage for app image
+FROM base AS runner
+WORKDIR /srv
+
+# Copy built application
+COPY --from=build /build/server/target/index.js /srv/index.js
+COPY --from=build /build/node_modules/.prisma/client /node_modules/.prisma/client
+COPY --from=build /build/node_modules/@img /node_modules/@img
+
+# Start the server by default, this can be overwritten at runtime
+EXPOSE 3000
+CMD [ "bun", "run", "./index.js" ]
diff --git a/README.md b/README.md
index 598d7edb..d3b8945e 100644
--- a/README.md
+++ b/README.md
@@ -72,6 +72,6 @@ make prepare-deploy-web`
 
 server:
 ```sh
-make prepare-deploy-server
-make deploy-server
+# prisma がビルド時に DATABASE_URL を要求するため、 root に .env を作って、 .env.sample に従って埋めよう。
+bun deploy:server
 ```
diff --git a/flake.nix b/flake.nix
index c5786b20..79e4ae47 100644
--- a/flake.nix
+++ b/flake.nix
@@ -39,6 +39,7 @@
         packages =
           (with pkgs; [
             nix # HACK: to fix the side effect of the hack below, installing two instances of nix
+            flyctl
             gnumake
             nodejs
             biome
diff --git a/fly.toml b/fly.toml
new file mode 100644
index 00000000..0c62208c
--- /dev/null
+++ b/fly.toml
@@ -0,0 +1,24 @@
+# fly.toml app configuration file generated for coursemate on 2025-03-06T14:33:10+09:00
+#
+# See https://fly.io/docs/reference/configuration/ for information about how to use this file.
+#
+
+app = 'coursemate'
+primary_region = 'nrt'
+
+[build]
+
+[deploy]
+
+[http_service]
+internal_port = 3000
+force_https = true
+auto_stop_machines = 'stop'
+auto_start_machines = true
+min_machines_running = 0
+processes = ['app']
+
+[[vm]]
+memory = '512mb'
+cpu_kind = 'shared'
+cpus = 1
diff --git a/package.json b/package.json
index fbe2eb32..53a312ad 100644
--- a/package.json
+++ b/package.json
@@ -28,9 +28,10 @@
     "watch:server": "cd server; bun run dev",
     "seed": "cd server; bun prisma db seed",
     "prepare:deploy:web": "bun install && bun run build:web",
-    "prepare:deploy:server": "bun install",
     "deploy:web": "cd web; bun run start --port $PORT",
-    "deploy:server": "cd server; bun run src/index.ts",
+    "deploy:server": "bun run --env-file=.env :deploy:server",
+    ":deploy:server": "fly deploy --build-arg SQL_GENERATE_URL=$SQL_GENERATE_URL",
+    "docker:server": "docker build . --build-arg SQL_GENERATE_URL=$SQL_GENERATE_URL",
     "dev-db": "make dev-db",
     "test": "make test",
     "spell": "bunx cspell --quiet ."
diff --git a/server/.gitignore b/server/.gitignore
index c0bced27..f7361e03 100644
--- a/server/.gitignore
+++ b/server/.gitignore
@@ -2,8 +2,6 @@ node_modules
 
 # WARNING: DELETE THIS IF YOU FIND THIS
 .env
-
 .env.dev
-# deprecated, delete /dist if you have one
-/dist
+
 /target
diff --git a/server/Dockerfile b/server/Dockerfile
deleted file mode 100644
index 99b960c8..00000000
--- a/server/Dockerfile
+++ /dev/null
@@ -1,13 +0,0 @@
-FROM oven/bun:latest
-WORKDIR /coursemate/dev/server
-
-COPY package.json package-lock.json ./
-RUN npm ci
-
-COPY ./prisma ./
-RUN npx prisma generate
-
-COPY . .
-
-RUN npm run build
-CMD npx prisma db push && npm run serve
diff --git a/server/package.json b/server/package.json
index 32d9a02d..e23f0407 100644
--- a/server/package.json
+++ b/server/package.json
@@ -6,8 +6,10 @@
   "scripts": {
     "prepare": "bun --env-file=./.env.dev prisma generate --sql || (echo 'please set DATABASE_URL in server/.env.dev' && exit 1)",
     "dev": "bun --watch src/index.ts",
-    "build": "tsc",
-    "serve": "bun target/main.js"
+    "check": "tsc",
+    "clean": "rm target -r || true",
+    "build": "bun clean && bun check && bun run :build",
+    ":build": "bun build ./src/index.ts --target bun --outfile target/index.js --minify"
   },
   "prisma": {
     "seed": "bun src/seeds/seed-test.ts"
diff --git a/server/prisma.nix b/server/prisma.nix
index bdb062f5..63cb161f 100644
--- a/server/prisma.nix
+++ b/server/prisma.nix
@@ -6,13 +6,13 @@
     (prisma-utils.lib.prisma-factory
       {
         inherit pkgs;
-        prisma-fmt-hash = "sha256-atD5GZfmeU86mF1V6flAshxg4fFR2ews7EwaJWZZzbc=";
-        query-engine-hash = "sha256-8FTZaKmQCf9lrDQvkF5yWPeZ7TSVfFjTbjdbWWEHgq4=";
-        libquery-engine-hash = "sha256-USIdaum87ekGY6F6DaL/tKH0BAZvHBDK7zjmCLo//kM=";
-        schema-engine-hash = "sha256-k5MkxXViEqojbkkcW/4iBFNdfhb9PlMEF1M2dyhfOok=";
+        prisma-fmt-hash = "sha256-iZuomC/KaLF0fQy6RVHwk2qq4DRaG3xj+sWmtLofiMU=";
+        query-engine-hash = "sha256-Pl/YpYu326qqpbVfczM5RxB8iWXZlewG9vToqzSPIQo=";
+        libquery-engine-hash = "sha256-ETwMIJMjMgZmjH6QGD7GVwYYlyx9mo2ydEeunFViCjQ=";
+        schema-engine-hash = "sha256-rzzzPHOpUM3GJvkhU08lQ7rNspdq3RKxMRRW9YZtvhU=";
       })
     .fromBunLock
-    ./bun.lock;
+    ../bun.lock;
   inherit (prisma) package;
 in {
   inherit (prisma) shellHook;
diff --git a/server/tsconfig.json b/server/tsconfig.json
index ac133f64..20df3ed0 100644
--- a/server/tsconfig.json
+++ b/server/tsconfig.json
@@ -1,6 +1,7 @@
 {
   "compilerOptions": {
     "target": "es2016",
+    "noEmit": true,
     "module": "commonjs",
     "rootDir": "./src",
     "outDir": "./target",