Bug when building the docker (deprecated celery option)

@Lauxley: I am seeing this when building with the latest commit.

escriptorium-celery-live-1 | You are using `-A` as an option of the worker sub-command: escriptorium-celery-live-1 | celery worker -A celeryapp <...> escriptorium-celery-live-1 | escriptorium-celery-live-1 | The support for this usage was removed in Celery 5.0. Instead you should use `-A` as a global option: escriptorium-celery-live-1 | celery -A celeryapp worker <...> escriptorium-celery-live-1 | Usage: celery worker [OPTIONS] escriptorium-celery-live-1 | Try 'celery worker --help' for help. escriptorium-celery-live-1 | escriptorium-celery-live-1 | Error: No such option: -A escriptorium-celery-live-1 exited with code 2 escriptorium-celery-main-1 | You are using `-A` as an option of the worker sub-command: escriptorium-celery-main-1 | celery worker -A celeryapp <...> escriptorium-celery-main-1 | escriptorium-celery-main-1 | The support for this usage was removed in Celery 5.0. Instead you should use `-A` as a global option: escriptorium-celery-main-1 | celery -A celeryapp worker <...> escriptorium-celery-main-1 | Usage: celery worker [OPTIONS] escriptorium-celery-main-1 | Try 'celery worker --help' for help. escriptorium-celery-main-1 | escriptorium-celery-main-1 | Error: No such option: -A escriptorium-celery-low-priority-1 | You are using `-A` as an option of the worker sub-command: escriptorium-celery-low-priority-1 | celery worker -A celeryapp <...> escriptorium-celery-low-priority-1 | escriptorium-celery-low-priority-1 | The support for this usage was removed in Celery 5.0. Instead you should use `-A` as a global option: escriptorium-celery-low-priority-1 | celery -A celeryapp worker <...> escriptorium-celery-low-priority-1 | Usage: celery worker [OPTIONS] escriptorium-celery-low-priority-1 | Try 'celery worker --help' for help. escriptorium-celery-low-priority-1 | escriptorium-celery-low-priority-1 | Error: No such option: -A escriptorium-celery-main-1 exited with code 0 escriptorium-celery-gpu-1 | You are using `-A` as an option of the worker sub-command: escriptorium-celery-gpu-1 | celery worker -A celeryapp <...> escriptorium-celery-gpu-1 | escriptorium-celery-gpu-1 | The support for this usage was removed in Celery 5.0. Instead you should use `-A` as a global option: escriptorium-celery-gpu-1 | celery -A celeryapp worker <...> escriptorium-celery-gpu-1 | Usage: celery worker [OPTIONS] escriptorium-celery-gpu-1 | Try 'celery worker --help' for help. escriptorium-celery-gpu-1 | escriptorium-celery-gpu-1 | Error: No such option: -A escriptorium-celery-low-priority-1 exited with code 0 escriptorium-celery-gpu-1 exited with code 0