Add support for local development with Docker

[atombrella]

All the node dependencies can clutter your local machine, and you may need different versions of node installed.

The Dockerfile was mainly inspired by the official documentation for NodeJS. https://nodejs.org/en/docs/guides/nodejs-docker-webapp/

Please be aware that there are several dependencies which are listed with npm audit. I'm not sure how much bandwidth you have for this project, but I'd suggest adding dependabot to the project.

[gstrauss]

@atombrella I recently updated most of the package version dependencies. Do you have any interest in testing out the current codebase?

[atombrella]

@atombrella I recently updated most of the package version dependencies. Do you have any interest in testing out the current codebase?

Yes, I'll try :)

[atombrella]

@gstrauss I updated it to use Node 22, and it runs smoothly. My branch is open for edits from repository maintainers.

I don't know why the NodeJS Alpine based base image cannot be used. It fails with :

[webpack-cli] Failed to load '/app/config/webpack.config.js' config
[webpack-cli] TypeError: Cannot read properties of undefined (reading 'trim')
    at revision (/app/config/webpack.config.js:14:85)
    at Object.<anonymous> (/app/config/webpack.config.js:25:15)
    at Module._compile (node:internal/modules/cjs/loader:1565:14)
    at Object..js (node:internal/modules/cjs/loader:1708:10)
    at Module.load (node:internal/modules/cjs/loader:1318:32)
    at Function._load (node:internal/modules/cjs/loader:1128:12)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:219:24)
    at Module.require (node:internal/modules/cjs/loader:1340:12)
    at require (node:internal/modules/helpers:138:16)
The command '/bin/sh -c npm install --save-dev copy-webpack-plugin &&     npm install --save-dev webpack webpack-cli &&     npm run build --save-dev' returned a non-zero code: 2

Can the draft mode be removed?

[gstrauss]

[webpack-cli] TypeError: Cannot read properties of undefined (reading 'trim')

My guess is that the git command is failing, probably because it is missing, or because you are not running inside a git working-copy. Do you have git installed in the container? As the git revision is only included in the HTML at bottom right of the page, I think I'll modify the code to be tolerant of failure to retrieve the git revision.

[gstrauss]

Why does the RUN command explicitly install copy-webpack-plugin and webpack-cli? Why not simply npm install and npm build, as documented in README.md?

[atombrella]

@gstrauss I've updated it, and the missing git as the reason why Alpine didn't work.

[gstrauss]

@atombrella Thank you. I am going to check with others for some input, but expect to resolve this PR before the end of January (and hopefully much sooner).

[gstrauss]

LGTM! Thank you for your contribution! (and thank you for your patience)