Consider using an ignored `build` directory instead of mixing ignored/included `public` files

[Gabriel Lebec]

I sometimes see students use tools which dynamically generate assets meant to be served up (e.g. CSS files, svgs, etc.). Students use public as the build target but fail to gitignore those assets, meaning they end up in version control.

Arguably a better idea is to have separate public and build directories, the former being included and the latter being ignored, both served up statically. Webpack would build to build, and other tools could as well; conversely, students would be taught that everything in public is supposed to be tracked in version control.

[Kate Humphrey]

I really like this idea 👍