Allow interface config for `:1455` (or just swap it to 0.0.0.0)

[knksmith57]

I was ~95% through containerizing ccm, then hit a wall: the OpenAI Codex callback listener is hardcoded to bind to loopback, and can't be configured to use another interface.

Understood that the port must remain 1455. Are you open to allowing configuration of the interface though, so that folks can have more flexibility with how they choose to run ccm?

Thanks for an awesome project!