Crane Container Image for s390x

[skriesch]

Describe the feature

You are providing container images for arm and x856 until now. Other open source projects are using your container images as a foundation for building their own projects. Kubernetes-based projects have got new hybrid cloud features and that makes it possible to combine x86 and arm together with the mainframe architecture s390x.

I have seen, that you are building your container images with docker buildx, what is the best opportunity for multi-arch container images. Based on that, you can build for following architectures:
linux/amd64, linux/amd64/v2, linux/amd64/v3, linux/arm64, linux/riscv64, linux/ppc64, linux/ppc64le, linux/s390x, linux/386, linux/mips64le, linux/mips64, linux/loong64, linux/arm/v7, linux/arm/v6

I want to add the s390x architecture to your build pipelines. Your code is buildable on this architecture (verified via openSUSE). Is that ok for you?