This is a relay project that I run and is under active development. I tried to make the setup as simple as possible, automating most of the process and including a setup video:

I also just rolled out a relay admin graphical user interface so you can manage your relay's allowlist remotely without having to SSH into the server.

If you did end up trying to set these up, I would be happy to support if you have any questions! Feel free to shoot me a DM: npub1g5pm4gf8hh7skp2rsnw9h2pvkr32sdnuhkcx9yte7qxmrg6v4txqqudjqv