add procfile heroku

backend/app.js

@@ -125,8 +125,6 @@ app.post('/avatar', async (req, res) =>  {
     }
 })
 
-
-
 app.post('/files', async (req, res) =>  {
     if (!req.files || Object.keys(req.files).length === 0) {
         return res.status(400).json('No files were uploaded.');