Multi-architecture docker images (arm64 support)

[mwgamble]

The outcome of #3423 was a docker image being published automatically to Docker Hub for each release. This is awesome and helps lower the barrier to entry :)

However, it only builds an image for the amd64 architecture. It would really help those using Apple Silicon devices (M1 etc) if there was an arm64 image published too.

[escapedcat]

Wanna create a PR?
/cc @kaiehrhardt

[kaiehrhardt]

fyi https://github.com/conventional-changelog/commitlint/blob/master/.github/workflows/container-build.yml#L44

nodejs/docker-node#1335

I can still give it a try soon.

[escapedcat]

@kaiehrhardt thanks for the feedback!
@mwgamble wanna give it a try?

[mwgamble]

I don't have capacity to do it at the moment sorry.