ADD mirror_url to simpe project api

app/helpers/projects_helper.rb

@@ -35,7 +35,8 @@ module ProjectsHelper
       tmp_json = tmp_json.merge({
         mirror_status: repo.mirror_status,
         mirror_num: repo.mirror_num,
-        first_sync: repo.first_sync?
+        mirror_url: repo.mirror_url,
+        first_sync: repo.first_sync?,
       })
     end