use delegateToNext for root path

packages/app/src/server/routes/index.js

@@ -76,8 +76,7 @@ module.exports = function(crowi, app) {
 
   app.get('/_next/*'                  , next.delegateToNext);
 
-  // app.get('/'                         , applicationInstalled, unavailableWhenMaintenanceMode, loginRequired, autoReconnectToSearch, injectUserUISettings, next.delegateToNext);
-  app.get('/'                         , applicationInstalled, unavailableWhenMaintenanceMode, loginRequired, autoReconnectToSearch, injectUserUISettings, page.showTopPage);
+  app.get('/'                         , applicationInstalled, unavailableWhenMaintenanceMode, loginRequired, autoReconnectToSearch, injectUserUISettings, next.delegateToNext);
 
   app.get('/login/error/:reason'      , applicationInstalled, login.error);
   app.get('/login'                    , applicationInstalled, login.preLogin, login.login);