show dashboard notice if forum is running in dev mode

src/controllers/admin/dashboard.js

@@ -30,6 +30,14 @@ dashboardController.get = function (req, res, next) {
 					link:'/admin/extend/plugins'
 				}
 			];
+
+			if (global.env !== 'production') {
+				notices.push({
+					done: false,
+					notDoneText: '[[admin/general/dashboard:running-in-development]]'
+				});
+			}
+
 			plugins.fireHook('filter:admin.notices', notices, next);
 		}
 	}, function (err, results) {