Crossbuild docker image for different architectures

[Pentusha]

For issue #54
In order to use this code, you need to setup secrets in the repository. Repo settings -> Secrets
DOCKER_USERNAME
DOCKER_PASSWORD

[TwiN]

Won't this just create multi-arch images for the latest tag?

I was initially planning on using a manifest instead of buildx and using Docker Hub's build rules to build the images rather than leveraging a GitHub action

[Pentusha]

Won't this just create multi-arch images for the latest tag?

It would create image for the latest tag. You may specify your custom tag or list of tags, even git commit.

[TwiN]

Alright, I've had a closer look and could you make the following changes?:

1. Rename the existing .github/workflows/build.yml to .github/workflows/test.yml
2. Create a new workflow file (.github/workflows/docker.yml) specifically for building the docker images on releases:

on:
  release:
    types: [published]

That way we should be able to use the GITHUB_REF environment variable to extract the tag.
The idea is that I want to only build images for other platforms when I release a new version rather than on the latest version.

Let me know if you need help.

[Pentusha]

It seems to be working fine

[TwiN]

Thank you for your contribution @Pentusha, and sorry for the delay. I've had a busy week 😅

[TwiN]

Released in v1.9.1

P.S. I've also removed linux/arm/v6, as linux/arm/v7 and linux/arm64 covers all requested use cases right now.
This also lowers the time for the action to complete, but I might re-add it if it becomes necessary in the future.