assets should be able to be accessed from root url

Right now we use `/assets/(js|css|img|fonts)`
We should use: `/(js|css|img|fonts)`

This will allow deployment of the generated site to static sites such as github pages, without changing any urls to assets.

No file or test is named in the issue. Locate the generator entry point that emits asset URLs, then generate a sample site and inspect its JavaScript, CSS, image, and font references. Done means those references use /js, /css, /img, and /fonts at the root so the generated site works on GitHub Pages.

Written by the indexing model from the issue text.