Helm chart: Package and publish it as an OCI artifact

[mkilchhofer]

Hi @chihyuwu

I'd like to continue the discussion of

• Helm Chart #8

Can you package the Helm chart and publish it to either Docker Hub or GitHub Container registry (ghcr.io)?

If so, I'd happy to PR a GitHub action which can do that.

How is your releasing of the container image to Docker Hub automated?