If you don't care about it being nostr-based, this already exists. It's called #FreeNet.
Discussion
Freenet is a P2P oriented alterative to Tor. You can provide basically any webservice on Freenet but it’s not focused on leaking data securely.
Freenet is a P2P oriented alterative to Tor. You can provide basically any webservice on Freenet but it’s not focused on leaking data securely.