Deploying a Django app with background workers: what is the cleanest setup?

Django web plus Celery workers plus beat. Should these be three process groups in one app, or separate apps?

Three process groups in one app is the common setup: they share the image and secrets, and you scale each one independently with lark scale count web=2 worker=1 beat=1. Keep exactly one beat.

Exactly one beat is the bit I would have got wrong. Thank you.