docs: def container_name(self):
          """
          The container_name is the concatenation of ``image_name`` and a uuid1 string
  
          We also remove the url portion of the ``image_name`` before using it.
          """
          if getattr(self, "_container_name", NotSpecified) is NotSpecified:
              self.container_name = "{0}-{1}".format(self.image_name.replace("/", "--").replace(":", "---"), str(uuid.uuid1()).lower())
          return self._container_name