You may notice it’s based on the similar site I made for elementary OS forever ago:
https://appcenter.elementary.io/
It’s a neat little hacky project that uses GitHub Actions to refresh the metadata used to build static pages.
If anyone wants to upstream improvements from the Endless site back to the elementary one, feel free—I probably can’t justify spending work time on it right now when my last PR to unbreak the site² has been sitting approved but unmerged since August.