Install the Heroku CLI Download and install the Heroku CLI . If you haven't already, log in to your Heroku account and follow the prompts to create a new SSH public key. $ heroku login Create a new Git repository Initialize a git repository in a new or existing directory $ cd my-project/ $ git init $ heroku git:remote -a mernstackblogappdemo Deploy your application Commit your code to the repository and deploy it to Heroku using Git. $ git add . $ git commit -am "make it better" $ git push heroku master Existing Git repository For existing repositories, simply add the heroku remote $ heroku git:remote -a mernstackblogappdemo Source: https://devcenter.heroku.com/articles/heroku-cli