Is your feature request related to a problem? Please describe.

Currently, when I want to customize how aichat is served, I can specify an argument for --serve option:

aichat --serve 0.0.0.0:34051

I would like to have an option to pre-configure the CLI via either env var or config.yml file so that I can run the serve without specifying address explicitly.

Describe the solution you'd like

# Via env
AICHAT_ADDRESS=0.0.0.0:34051 aichat --serve

# Via config.toml
address: 0.0.0.0:34051

It'd be even better to be able to specify host/port pair separately, but I understand that it's a bit more to ask