Note from 26 November 2022

I'm still looking for an alternative to Forestry:
https://forestry.io/blog/tina-cloud-the-next-forestry/

As Netlify doesn't seem to care for Netlify CMS anymore:
https://answers.netlify.com/t/is-this-project-dead/70988/1

A fork managed by a community might be a good solution, I'll keep an eye on it:
https://staticjscms.netlify.app/