mcad-controller image should be created with a non-root user

[jbusche]

Noticing that the mcad-controller image is running as root:

podman run -it --rm quay.io/project-codeflare/mcad-controller:main-v1.29.51 whoami
root

I'm proposing a PR which would create an "mcad" user.

podman run -it --rm docker.io/jimbdocker/mcad-controller:jbusche-nonroot-v1.29.52 whoami
mcad

Official guidance is the following:
"It is a good practice to run the container as a non-root user, if possible. Though user namespace mapping is now available, if a user is already defined in the container image, the container is run as that user by default and specific user namespace remapping is not required"

[asm582]

@jbusche can we close this issue?

[jbusche]

Yes, looks good! Closing:

whoami
1000670000