Publish multiarch Images

I want to try out kubeplus in my homelab as ground work for a future project. Currently, my lab only has arm64 devices meaning I can't use official images. This leaves me with 2 options

- Setup github actions on my fork and publish the images to my docker account then fiddle with the setup process to use my custom images
- Spend time adding support for building multiarch to the project and then keep using the official images.
I prefer the second approach of course but since I don't see any CI process that is building the image within the repo I am assuming it is handled by a process outside the repo. So if I can get details about how the images are built I can try to work on this over the weekend.