Add option to bind server to specific IP address

[Htypew]

I would like to suggest a feature enhancement for the server configuration. Currently, the server binds to all interfaces (0.0.0.0) with no option to specify a binding IP address.

It would be very helpful if you could consider adding an optional host field to the server configuration to allow binding to specific IP addresses (e.g., 127.0.0.1 for localhost only). This would improve security and make it easier to proxy the server through Nginx.

Thank you for considering this request and for your great work on this project!