Moving to GitHub for hosting our containers

[moabu]

Dear community,

The Janssen Project is moving its container images hosting from DockerHub to GitHub. This means images will be located in the Packages under https://github.com/JanssenProject/jans and will be prefixed with ghcr.io/janssenproject/jans. In other words, the charts will default the repository key of each service with the new locations. Forexample scim will be moved from janssenproject/scim to ghcr.io/janssenproject/jans/scim

Thank you for being a valued member!

@moabu