Build and push Docker image on tag by mvitale1989

[florian-asche]

Add MR from rhasspy#188

Thank you for this awesome project! This PR adds support for docker image build&publish to the Github image registry, when a tag is pushed.

If e.g. tagging a commit as v1.3.0, this workflow will make the image available as:

ghcr.io/rhasspy/wyoming-satellite:1.3.0
ghcr.io/rhasspy/wyoming-satellite:1.3
ghcr.io/rhasspy/wyoming-satellite:latest

I had built the 1.2.0 image for myself (can be inspected with docker pull ghcr.io/mvitale1989/wyoming-satellite:1.2.0-1, with a slightly different tagging scheme) to use it in my k8s cluster, but it'd be great if this is done in the project repo itself.

The additional dependencies are useful client tools to record/play sound against the most common sound servers.