Stop the serving container.

        The serving container runs in async mode to allow the SDK to do other tasks.

def stop_serving(self):
        """Stop the serving container.

        The serving container runs in async mode to allow the SDK to do other tasks.
        """
        if self.container:
            self.container.down()
            self.container.join()
            self._cleanup()
        # for serving we can delete everything in the container root.
        _delete_tree(self.container_root)