The Procfile | Heroku Dev CenterHeroku apps include a Procfile that specifies the commands that are executed by the app on startup. You can use a Procfile to declare a variety of process types, including: Your app’s web server Multiple types of worker processes A singleton process, such as a clock Tasks to run before a new release is deployed Each dyno in your app belongs to one of the declared process types, and it executes the
