Turn off logging for production mode

app.js

@@ -20,7 +20,9 @@ app.set('view engine', 'pug');
 
 // uncomment after placing your favicon in /public
 app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
-app.use(logger('dev'));
+if (env === 'development') {
+  app.use(logger('dev'));
+}
 app.use(bodyParser.json());
 app.use(bodyParser.urlencoded({ extended: false }));
 app.use(cookieParser());