What miss it's an easier way to choose our server with an auto select (based on location) of them (if the operator of the relay agree to join), to push user accross them.

For 1 increate server failure resillience (if everyone is on the default and that one stop the whole system is down).

Finish the docker image (must be a emergency feature).

And finally approach governement like Germany, France etc to use your app, and make it more known.