Added spread operator to value in db update

services/notifications/app/js/Notifications.js

@@ -87,7 +87,7 @@ module.exports = Notifications = {
       }
       return db.notifications.update(
         { user_id: doc.user_id, key: notification.key },
-        { $set : doc },
+        { $set : { ...doc } },
         { upsert: true },
         callback
       )