Possibility to specify listening IP

[fiksn]

I'd need this to make LnMe -listen 127.0.0.1 so instance will not be directly reachable eventhough I might make some mistake with iptables - I have some reverse proxy sitting in front of it then.

[bumi]

good improvement! thanks
can we combine this with the port option?
to use --listen=":3000" or --listen="localhost:3000" ?

even though we then need to slowly deprecate the port option.

[fiksn]

good improvement! thanks can we combine this with the port option? to use --listen=":3000" or --listen="localhost:3000" ?

even though we then need to slowly deprecate the port option.

I agree, if listen was used for ip & port that would be even better. Wasn't sure about the deprecation of port - in particular how to resolve conflicting port and listen, best option is probably just to error out in such a case. And if there is just port treat it as listen=:port and write some deprecation warning to stderr.

[bumi]

I think that's a good idea.
If port is set and NO listen is provided we do listen=:port. otherwise we error or ignore the PORT option and add a deprecation warning here

this way it is backward compatible for current deployments and newer deployments can use the new listen option.
We just need the support for the PORT environment variable for cloud providers like heroku

[fiksn]

Is my second commit ok? I can squash the stuff into one so there will be a more linear history.

[bumi]

looks great! thanks a lot.
I think I can squash it here on GitHub when merging. that's good I think.