You could try https://simplyedit.io/, disclaimer: I'm one of the authors and it's not (fully) open source. Its a blend between a static site generator and a CMS, as it runs mostly in the browser, not on the server. This means there is very little attack surface on the server. You can very easily write your own server side or connect it to an existing backend.
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You could try https://simplyedit.io/, disclaimer: I'm one of the authors and it's not (fully) open source. Its a blend between a static site generator and a CMS, as it runs mostly in the browser, not on the server. This means there is very little attack surface on the server. You can very easily write your own server side or connect it to an existing backend.