langchain/cli/main.py/PlusCommand/stop
class PlusCommand:    def stop(self) -> None:
        """Stop the LangChainPlus server."""
        subprocess.run(
            [
                *self.docker_compose_command,
                "-f",
                str(self.docker_compose_file),
                "-f",
                str(self.ngrok_path),
                "down",
            ]
        )