old_contents: from waldur_core.core import WaldurExtension
  
  
  class MarketplaceScriptExtension(WaldurExtension):
  
      class Settings:
          WALDUR_MARKETPLACE_SCRIPT = {
              'DOCKER_CLIENT': {
                  'base_url': None,
              },
              'DOCKER_RUN_OPTIONS': {
                  'mem_limit': '64m',
              },
              'DOCKER_IMAGES': {
                  'python:3.7-alpine': 'python',
                  'alpine:3.10.0': 'sh',
              },
          }
  
      @staticmethod
      def django_app():
          return 'waldur_mastermind.marketplace_script'
  
      @staticmethod
      def is_assembly():
          return True
  
new_contents: from waldur_core.core import WaldurExtension
  
  
  class MarketplaceScriptExtension(WaldurExtension):
  
      class Settings:
          WALDUR_MARKETPLACE_SCRIPT = {
              # See also: https://docker-py.readthedocs.io/en/stable/client.html#docker.client.DockerClient
              'DOCKER_CLIENT': {
                  'base_url': None,
              },
              # See also: https://docker-py.readthedocs.io/en/stable/containers.html#docker.models.containers.ContainerCollection.run
              'DOCKER_RUN_OPTIONS': {
                  'mem_limit': '64m',
              },
              # Key is image name, value is command to execute script.
              'DOCKER_IMAGES': {
                  'python:3.7-alpine': 'python',
                  'alpine:3.10.0': 'sh',
              },
          }
  
      @staticmethod
      def django_app():
          return 'waldur_mastermind.marketplace_script'
  
      @staticmethod
      def is_assembly():
          return True
  
subject: Add documentation links.