code: def extra_context(self):
          
          from django.conf import settings
  
          return {
              "site_name": (lambda r: settings.LEONARDO_SITE_NAME
                            if getattr(settings, 'LEONARDO_SITE_NAME', '') != ''
                            else settings.SITE_NAME),
              "debug": lambda r: settings.TEMPLATE_DEBUG
          }
docs: Add site_name to context