Add learn button to navbar

common/app/routes/index.js

@@ -1,10 +1,15 @@
 import Jobs from './Jobs';
 import Hikes from './Hikes';
+import NotFound from '../components/NotFound/index.jsx';
 
 export default {
   path: '/',
   childRoutes: [
     Jobs,
-    Hikes
+    Hikes,
+    {
+      path: '*',
+      component: NotFound
+    }
   ]
 };