I've build something like this using Hugo as a SSG and a custom Micropub-backend that commits new content to a Git repo and pushes it to a Git hosting platform.

I've build something like this using Hugo as a SSG and a custom Micropub-backend that commits new content to a Git repo and pushes it to a Git hosting platform. That then triggers a CI build for the site generation and upload to the webserver as well as a CDN purge.