Publish helm chart also as an OCI package (e.g. on GHCR/quay.io registry)

[mkilchhofer]

The helm chart of version-checker is published using the classic approach with a static webserver and an index.yaml. In helm 3.8+ the OCI method went GA:

• https://blog.bitnami.com/2023/04/httpsblog.bitnami.com202304bitnami-helm-charts-now-oci.html?m=1
• https://helm.sh/docs/topics/registries/
• https://github.com/helm/helm/releases/tag/v3.8.0

I see two options to use as an OCI mirror:

• GHCR (Github packages) You need to think about the Github organizational plan. On free plan there are 500MB included
• Quay.io (where you also push the container images)