Provide images for non x86_64 architectures

[benob]

I am thinking of Raspberry pi 4 which is aarch64

[moigagoo]

Sounds like a very much doable thing. However, I'm not familiar with Raspberry Pi, don't even know what OS it has. So, if you're in the loop, feel free to send a PR.

[benob]

I haven't compiled the hole set of images, but I was able to get nim:alpine to work out of the box (host OS is ubuntu).

• Is it possible to cross-compile using an emulator such as qemu to cross-compile from an x86_64 host ?
• Would you be interested for me to compile the images and upload them to my docker hub account?

[benob]

For reference I have started uploading arm64 images to https://hub.docker.com/r/benob/nim
Also, it seems possible to automate the build process for non-x86 targets #docker/hub-feedback#1261

[moigagoo]

Duplicates #40