That’s a good question since usually these are built into the docker-compose by default. I think my answer would be that it’s to get the same build environment

That’s a good question since usually these are built into the docker-compose by default. I think my answer would be that it’s to get the same build environment on my Mac as on prod (i.e. a Linux server), but in practice I don’t think platform-specific details matter. If that’s the case, why not run Python/gunicorn locally as well, and drop docker entirely?