show express url when debugging

bin/www

@@ -86,5 +86,5 @@ function onListening() {
   var bind = typeof addr === 'string'
     ? 'pipe ' + addr
     : 'port ' + addr.port;
-  debug('Listening on ' + bind);
+  debug(`Listening on http://${addr.address}:${addr.port}  `);
 }