==> git init - create a new repo
        git status - view the changes to your project code 
        git add - add files to staging area
        git commit - created a new commit with files from staging area
        git log - view recent commits

Remove the package-lock.json : git rm package-lock.json
To push exiting project : heroku git:remote -a my-daily-expenses final : git push heroku master:master heroku open

this command add modified files not new files : git commit -am "comment here"

yarn install --production

-heroku config - it print out all of your environment variable -heroku config:set KEY=value - it set up the env variable -heroku config:unset - remove the env variable

-npm install --legacy-peer-deps -npm i -g [email protected] -npm root -g