https://github.com/gbozee/wot-relay/blob/master/docker-compose.yml you would want to replace the host settings (line 28) with your domain/subdomain. Starting both services should be fine. Also I reduced the size of the final docker image.
I'm going to look into that, I think I need to learn docker. For now I have it successfully connecting over wss! Except it just gives errors. OK 😅 https://i.nostr.build/BQNOu5UxkpKQyZo4.jpg