- Remove all webpack and babel related npm dependencies
- Add esbuild and esbuild-plugin-postcss2 as a dependency
- Add a custom `build.js` script to build css and js with esbuild
and copy static files to the priv/static directory
- Modify `config/dev.exs` to use that build script as a watcher instead
of webpack
- Modify `package.json` to use that build script in instead of webpack
- Modify `KetbinWeb.Endpoint` to serve the assets directory instead of
css and js directories from static
- Modify the `app.html.eex` layout to use `assets` directory instead of
separate css and js directories
Signed-off-by: Akshit Garg <garg.akshit@gmail.com>