Heroku

Procfile

The primary way to configure your dynos is through the use of a Procfile. The Procfile should be located in the root of your project directory.

<process type>: <command>

Gotchas

The process type must be alphanumeric. You can’t use special characters like - or :. Grrr.

Resources

https://devcenter.heroku.com/articles/procfile