Container registry image

[nxfi777]

Adding cachet to a container registry like ghcr.io would massively simplify deployment on various platforms. If updates to the container registry image were uploaded mutually with new releases, it would further improve the deployment process.

I can see on dockerhub the last image was uploaded 3 years ago

[jbrooksuk]

I could do with some help to get Docker all automated, if anyone is interested :)