Support Apple M1 / Multi-Arch Docker builds

[sc250024]

Description

Solves #94.

• The GoReleaser action and the Go version are updated to support builds for Apple Silicon
• Multi-arch Docker images have been added
  • https://carlosbecker.com/posts/multi-platform-docker-images-goreleaser-gh-actions/
  • https://www.docker.com/blog/multi-arch-build-and-images-the-simple-way/

[sc250024]

@norwoodj If you have a way of testing the Docker image builds with your DockerHub creds, when pushing, you should now see multiple digests corresponding to the different architectures.

I created an example repo called test-multi-arch in my own GitHub / DockerHub, and it appears like so after pushing.

multi-arch-example.png

[norwoodj]

Hello @sc250024. Thanks for the contribution. I'll try to take a look and merge soon