feat(api): split api into multiple apps (#1626)

Fixes #1622

- split the api into 4 apps: core, history, schedule, storage
- exploded the settings into testing/prod

api/libretime_api/wsgi.py

@@ -1,16 +1,16 @@
 """
-WSGI config for api project.
+WSGI config for libretime_api project.
 
 It exposes the WSGI callable as a module-level variable named ``application``.
 
 For more information on this file, see
-https://docs.djangoproject.com/en/3.0/howto/deployment/wsgi/
+https://docs.djangoproject.com/en/3.2/howto/deployment/wsgi/
 """
 
 import os
 
 from django.core.wsgi import get_wsgi_application
 
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "libretime_api.settings")
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "libretime_api.settings.prod")
 
 application = get_wsgi_application()