https://dashboard.heroku.com/apps/
git init
ctr+alt+a or git add .
git commit -m "first commit"
heroku login
heroku create
heroku config:set MONGODB_URI="mongodb+srv://user:user@cluster0.fv5ou.mongodb.net/myFirstDatabase?retryWrites=true&w=majority"
git push heroku master
heroku open
heroku config:get MONGODB_URI
SERVER
================= git init
npm i express
git commit -m "First commit"
heroku create navatar-mern
git push heroku master