heroku create $APP_NAME --buildpack https://github.com/mars/create-react-app-buildpack.git
with npx
npx heroku-cli create $APP_NAME --buildpack https://github.com/mars/create-react-app-buildpack.git
heroku apps:rename newname
with npx
npx heroku-cli apps:rename newname --app oldname
git remote rm heroku
heroku git:remote -a newname
with npx
git remote rm heroku
npx heroku-cli git:remote -a newname