First you will create a new Heroku application. Before executing the following command, check that you are inside the ruby-getting-started directory:

$ heroku create
Creating mighty-atoll-7219... done, stack is cedar-14
https://mighty-atoll-7219.herokuapp.com/ | https://git.heroku.com/mighty-atoll-7219.git
Git remote heroku added

A new application was created with the name mighty-atoll-7219 and provided at https://mighty-atoll-7219.herokuapp.com. This URL will start working only after the first deploy. A Git repository was also created. This repository is available at https://git.heroku.com/mighty-atoll-7219.git and you can also add it using the git [some action] heroku command.

Finally, for starting the deploy, just type the command:

$ git push heroku master
Counting objects: 168, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (110/110), done.
Writing objects: 100% (168/168), 30.31 KiB | 0 bytes/s, done.
Total 168 (delta 46), reused...