Publish Docker images for ARM architecture

[ngosang]

It's easy with Docker buildx. I'm doing it in some of my projects with GitHub actions => https://github.com/ngosang/docker-amule/blob/master/.github/workflows/release-docker.yml#L49

Requested archs:

• linux/arm/v7 => arm32
• linux/arm64/v8 => arm64

[fdw]

I think this is a duplicate of #125 .

[MichaelEischer]

Closed as duplicate.

[ngosang]

I built and published my own image with support for 7 architectures. I will maintain it for now, but I would prefer that at some point the official Docker image includes support for multi-arch so I don't have to maintain it. Fell free to copy anything you need from my repository.

• Source code / issues: https://github.com/ngosang/docker-restic-rest-server
• Docker image: https://hub.docker.com/r/ngosang/restic-rest-server