Restructure the Dockerfile and the CSS/JS files so that we only rebuild
the CSS and JS when they change, not on every commit.
Before it took several minutes to rebuild the Docker image after every
commit, even when the JS/CSS files didn't change. This also made pulling
images slower.
This requires refactoring the CSS and JS to not use embedded Ruby (ERB)
templates, since this made the CSS and JS dependent on the Ruby
codebase, which is why we had to rebuild the assets after every Ruby
change.
Caused by Webpack clobbering the `Danbooru` variable for unknown reasons
when the app/javascript/packs/flash.js pack is loaded. Disabling the
output.library option seems to fix it.
* Add README files to several directories in app/ giving a brief
overview of some parts of Danbooru's architecture.
* Add documentation for files in config/.
Allow viewing Flash posts with the Ruffle emulator.
Known issues:
* Many flash files aren't fully supported.
* In development it sometimes spazzes out and starts triggering random
keyboard shortcuts when you press any key. This doesn't happen with
the browser extension.
* We have to put the .wasm file in the public/packs/js directory because
Ruffle is hardcoded to search for it there.
* If you're running Nginx, you need to make sure you're serving the
right MIME type for .wasm files or it won't work.
* We're using Some Random Guy's unofficial NPM package for Ruffle, since the
Ruffle project doesn't publish an official package themselves. We
should build our own package.
References:
* https://github.com/ruffle-rs/ruffle
* https://github.com/ruffle-rs/ruffle/wiki/Using-Ruffle#configure-webassembly-mime-type
* https://www.npmjs.com/package/ruffle-mirror
