docker password - minor issue?

[merryHunter]

Hi, I noticed that when running with docker from private registry, there is following print in the logs due to usage of password, not --password-stdin. Ideally, we would want to have password from the variable instead of passing directly from. Is it something worth a PR or not really?

D 09-26 10:08:55 docker_utils.py:160] + docker login --username AWS --password  ....
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /home/ubuntu/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded
D 09-26 10:08:55 docker_utils.py:160] + docker pull ....