http://lpoaj76nfopd5lpinbskyqtroppamrzhhay3g4vvjm75st6ger34lbyd.onion/posts/2020/07/source-code-is-up.html
Of course, this is a static site, and there is not much that is extremely original or useful in there. Still, if you want a simple and secure setup with Caddy and Cobalt, reusing parts of it might work for you. Furthermore, the code is fully free, so really, just do whatever you want with it.