How to connect to google cloud docker service using python in cloud run

I would like to connect to a docker service from a cloud run serverless with python. For example when I run this inside a cloud run service:

import docker
client = docker.from_env()

I get this error: docker.errors.DockerException: Error while fetching server API version: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

I should create env file but I don’t know what should be the content of this file.

I want to open and close various containers using this docker client.
What should I specify in my env file to connect to my GCP project?

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