publish image to github packages

[simplyRoba]

https://gist.github.com/mihkels/f19ea45e4d05b7741569d7575f5f7026

https://github.com/docker/setup-qemu-action
https://github.com/docker/setup-buildx-action
https://github.com/docker/metadata-action
https://github.com/docker/login-action
https://github.com/docker/build-push-action

https://docs.github.com/en/actions/publishing-packages/publishing-docker-images#publishing-images-to-github-packages

https://docs.docker.com/build/ci/github-actions/multi-platform/

https://spring.io/guides/topicals/spring-boot-docker/

# platforms: linux/amd64,linux/arm64,linux/riscv64,linux/ppc64le,linux/s390x,linux/386,linux/mips64le,linux/mips64,linux/arm/v7,linux/arm/v6
platforms: linux/amd64,linux/arm64,linux/arm/v7,linux/arm/v6