Baked Data
The The Baked Data architectural pattern describes this approach, which is key to taking full advantage of SQLite and Datasette.
I like to build my databases in GitHub Actions.
Niche Museums and TILs
https://www.niche-museums.com/ is published from the https://github.com/simonw/museums repository - one big YAML file for the content.
https://til.simonwillison.net/ is published https://github.com/simonw/til - separate Markdown files for each item.
Both of these sites have Atom feeds that are defined using a Datasette canned query, in conjunction with the datasette-atom plugin.