This site is built with 11ty. _site is the build output directory; it should not be committed to git and be careful not to directly modify files within _site/!! They will get overwritten on every build.
If you need some Eleventy starting pointers, Cassey has a couple blog posts: Getting your bearings in an existing 11ty project and Just Enough JavaScript for Eleventy.
The CMS to add creators without writing code or touching Github is Decap CMS. Access it at theurl.com/admin by logging in with a GitHub that's a contributor the project. functions/api is a Cloudflare serverless function to handle that authing to Github.
If you Publish a post through the CMS, that will trigger a commit to main, and will deploy the site automatically.
Set up the Decap CMS on Cloudflare Pages following the instructions for i40west/netlify-cms-cloudflare-pages. The files you need are already in the repo.
Site is set up to be hosted in Cloudflare. A daily cron job triggers a new build every day which is important mainly so that the item list shuffles order every day - the item at the top probably won't be at the top of the list tomorrow, and no one should get stuck at the bottom either. Remove the shuffle filter from the item list display in index.njk if you don't want this.
Builds/deploys happen automatically on pushes to main on Github. If you make a PR, you can expand the PR details to see a preview build.
.nvmrc says 18 which was chosen somewhat arbitrarily as what I had on my machine at the time, you are welcome to upgrade if needed.