Transitions the backend to celery and celery beat

src/paperless/celery.py

@@ -0,0 +1,17 @@
+import os
+
+from celery import Celery
+
+# Set the default Django settings module for the 'celery' program.
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "paperless.settings")
+
+app = Celery("paperless")
+
+# Using a string here means the worker doesn't have to serialize
+# the configuration object to child processes.
+# - namespace='CELERY' means all celery-related configuration keys
+#   should have a `CELERY_` prefix.
+app.config_from_object("django.conf:settings", namespace="CELERY")
+
+# Load task modules from all registered Django apps.
+app.autodiscover_tasks()