[Feat]: Dockerfile: should run as non-root

[erikschul]

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Is your feature request related to a problem? Please describe.

The Dockerfile defaults to running as root. Directory /var/lib/registry/ is not writeable for non-root users.

Describe the solution you'd like

Dockerfile should create directories that are writable by other users, such that the container can be run with any uid.

Describe alternatives you've considered

No response

Additional context

No response

[rchincha]

@erikschul could you elaborate on what you were trying to do?

[erikschul]

I'm trying to run in Kubernetes with a non-root user, but I get permission denied errors. I think I solved it by using /zot/ instead, but now I'm experiencing an infinite loop. So I'll probably just try to build my own image instead. https://github.com/project-zot/zot/issues/1764

[erikschul]

Example dockerfile: https://github.com/docker-library/postgres/blob/master/Dockerfile-debian.template

• useradd
• chmod

[ericgraf]

@erikschul I solved this by mounting an emptydir at /var/lib/registry but requires my chane here. https://github.com/project-zot/helm-charts/pull/26