Don't load frontend if maintenance mode is turned on

aleksis/core/templates/core/vue_index.html

@@ -29,6 +29,8 @@
       <app ref="aleksisApp"></app>
     </main>
 
-    {% vite_asset 'aleksis/core/frontend/index.js' %}
+    {% if not need_maintenance_response %}
+      {% vite_asset 'aleksis/core/frontend/index.js' %}
+    {% endif %}
   </body>
 </html>