new_contents: from django.conf import settings
  
  NAME_FEED_AUTHOR_NAME = getattr(settings, 'NAME_FEED_AUTHOR_NAME', None)
  
  NAME_FEED_AUTHOR_EMAIL = getattr(settings, 'NAME_FEED_AUTHOR_EMAIL', None)
  
  NAME_FEED_AUTHOR_LINK = getattr(settings, 'NAME_FEED_AUTHOR_LINK', None)
  
subject: Add an app_settings file.