Configure listen address for chat

[michaelmior]

It would be helpful to be able to configure what address the server listens on for chat purposes and then also which URL is opened. This would make it possible to easily use chat to interact with code on a remote server without tunnelling.

[pqn]

I think one issue is that many servers can be spawned across IDEs/vim instances, so a consistent port can't be used.

cc @fortenforge

[michaelmior]

@pqn That's fine if the port isn't consistent. But I'd like to be able to listen on an external interface so I can easily use chat remotely.

[fortenforge]

I think we could do something where there's a vim setting that allows you to configure a chat port that will attempt to be used.