Create Prefect environment and deploy Flow

flow_deployment.py

from prefect.environments import DockerEnvironment


env = DockerEnvironment(
    base_image="python:3.6",
    registry_url="XXXXXXXX",
    python_dependencies=["google-cloud-firestore"],
    files={"~/google-creds.json": "/root/google-creds.json"},
    env_vars={"GOOGLE_APPLICATION_CREDENTIALS": "/root/google-creds.json"},
)

flow.environment = env

# builds the Docker image and pushes Flow metadata to the Prefect Cloud database
flow.deploy(project_name="marvin")