add logout

packages/app/src/server/views/maintenance-mode.html

@@ -39,6 +39,10 @@
                 <i class="icon-arrow-right"></i>
                 <a href="/login">{{ t('maintenance_mode.login') }}</a>
               </p>
+              <p>
+                <i class="icon-arrow-right"></i>
+                <a href="/logout">{{ t('maintenance_mode.logout') }}</a>
+              </p>
             </div>
           </div>
         </div>