old_contents: from django.conf import settings
  
  MEDIA_PREFIX = getattr(settings, 'NEXUS_MEDIA_PREFIX', '/nexus/media/')
  
new_contents: from django.conf import settings
  
  MEDIA_PREFIX = getattr(settings, 'NEXUS_MEDIA_PREFIX', '/nexus/media/')
  
  if getattr(settings, 'NEXUS_USE_DJANGO_MEDIA_URL', False):
      MEDIA_PREFIX = getattr(settings, 'MEDIA_URL', MEDIA_PREFIX)
  
subject: Add a setting NEXUS_USE_DJANGO_MEDIA_URL to easily use Django's MEDIA_URL for the nexus MEDIA_PREFIX.