Procfile

Heroku 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 startup command associated with that process type.

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Backlinks

• Heroku
• Procfile