Request: offer arm64v8 image

[RaMdsC]

At the time of writing, the image offered in DockerHub supports only amd64; as of Q2 2022, it is estimated Arm holds 9.5% consumer and 7.1% server CPU market share 1, which indicates the usefulness of adding arm64v8 support.

[moto-timo]

The issue is that GitHub Actions (which is how we build, test and publish the containers) only has x86 workers. To build arm64 (which everyone wants, including me) we need a self-hosted arm64 GitHub Actions server.

[lgrosz]

Would buildx+qemu actions be an acceptable addition to enable cross-architecture images? See this. I apologize if the link becomes stale.

[austinhallett]

I have opened this pr #107 to enable multi architecture builds