adding support for a default configuration paremeter for all environments to specify IP address, just like there's a port configuration by default (production.js env configuration file already references this config parameter)

Author: lirantal

app/templates/server/config/environment/index.js

@@ -21,6 +21,9 @@ var all = {
   // Server port
   port: process.env.PORT || 9000,
 
+  // Server IP
+  ip: process.env.IP || 'localhost',
+
   // Should we populate the DB with sample data?
   seedDB: false,