Command-line option to bind server socket to a specific interface

[pfisterer]

It should be possible to bind the server socket to a specific interface (i.e. IP address).

I assume that changing server.js from

var server = http.createServer(app).listen(process.env.PORT || 3000);

to

var server = http.createServer(app).listen(process.env.PORT || 3000, process.env.INTERFACE || '0.0.0.0');

should work.