This was being built a while ago but I'm not sure how well it works https://github.com/chakany/nblog

That said wouldn't be too difficult to pull all your nostr events into any of the static site generators and rebuild it every time you make a post
https://jamstack.org/generators/ 

 Do you even need to rebuild the static site every time? You just need to embed the Nostr JavaScript code, right? The notes would pulled from relays.