feat: initialize Celery app in config package for shared task support

config/__init__.py

@@ -5,4 +5,4 @@ from __future__ import absolute_import, unicode_literals
 # Django starts so that shared_task will use this app.
 from .celery import app as celery_app
 
-__all__ = ('celery_app',)
+__all__ = ('celery_app',)