Error response from keygen server: Not allowed

Hi, im trying to run a server in a docker container, but I can't connect to it. When I click join, nothing happens. 
I get that error in the log. Entire log here https://pastebin.com/YrFs2Wka
I read here that it is possible to run the server "keyless". How do I do that?
Thanks

That's not a fatal error, but it does mean xonstat won't work. It's probably because of ~/.xonotic not being persistent in your container. There's rate limiting on the key signing which you've hit, so after you fix the storage it will be some time before you can get a key signed and xonstat working (unless you want to tell me your public IP(s)).

Being unable to connect is a different issue, some part of your container's inbound networking is incorrect.

I don't think the container's inbound networking is incorrect because the server is listed in the game, so I think a first connection to get it's data is made
I don't understand how I'm hitting a rate limit if everytime I run the server is it's first time running
I'm gonna try persisting .xonotic and see what happens

It works if I add a volume. I think there is a bug here.
This is how it goes:
1) Run the container for the first time with the volume mounted in .xonotic with a dir that only has the .cfg file in .xonotic/data.
I can't connect to it.
2) Restart the container. I can connect to it.
Thanks for the suggestion