As my previous post says, the server that powers hd.206267.xyz is now open source. Yes, that wasn't an April Fool's Day joke: it's a real social network thingy and not static content dumped from the fediverse to fool the first visitors.
https://github.com/dimkr/tootik
Contributions are welcome: especially security, privacy, performance and reliability improvements. (Many areas of the code are ugly and can be cleaned up over time.)