Running Heroku background tasks with only 1 web dyno and 0 worker dynos

Question

I have a Python Flask app on Heroku that serves web pages but also allows certain tasks to be launched which I believe would be best structured as background tasks. As such

Answer 1

To start and run a process in background:

Procfile:

run: python my_app.py

And later, execute:

heroku ps:scale run=1