✨ Use Pydantic BaseSettings for config settings (#87)

* Use Pydantic BaseSettings for config settings

* Update fastapi dep to >=0.47.0 and email_validator to email-validator

* Fix deprecation warning for Pydantic >=1.0

* Properly support old-format comma separated strings for BACKEND_CORS_ORIGINS

Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>

{{cookiecutter.project_slug}}/backend/app/app/worker.py

@@ -1,9 +1,9 @@
 from raven import Client
 
-from app.core import config
+from app.core.config import settings
 from app.core.celery_app import celery_app
 
-client_sentry = Client(config.SENTRY_DSN)
+client_sentry = Client(settings.SENTRY_DSN)
 
 
 @celery_app.task(acks_late=True)