[Feature Request] support custom address argument

[chengcyber]

Question

I checked the code-base, and see the address is hard code to 127.0.0.1, I would like to pass a 0.0.0.0 as a host.

Expect

sth like this: systemfd -s http::0.0.0.0::3000

[whentze]

This actually works already, the hardcoded 127.0.0.1 is just for when you don't give an address.

The syntax looks like this:

systemfd -s http::0.0.0.0:3000