add page_migrate response

app/controllers/projects_controller.rb

@@ -127,7 +127,10 @@ class ProjectsController < ApplicationController
       page = Page.new page_site_params
       page.user = current_user
       page.project = @project
-      page.save
+    end
+
+    if page.save
+      render json: page
     end
   rescue Exception => e
     uid_logger_error(e.message)