Expose a way to change the host in config

[christianlime]

Do you want to request a feature or report a bug?
Feature

What is the current behavior?
I can only customize host with localhost, tunnel or lan

What is the expected behavior?
I want to be able to provide an alias for localhost for local web development. I don't want to be limited to only use localhost:{port}. This would be similar to using server.host as vite does, or webpack does with devServer.host

[robhogan]

Yeah, that's a reasonable request - it shouldn't be too difficult to implement following the example of the way port is passed through from both config and CLI args, we'd welcome a PR.