Actually it's the process how I (DIY) deploy several static sites from my local machine. I build the Docker image (hugo sites with nginx, expose a single port for HTTP traffic) and save it as tar. Ironically the base images do come from a registry, but I can't deploy to a public registry and don't want to host my own.

On the server where I need to run that site, I just transfer the tar, load the image and run the docker image. It's so straightforward I much more prefer this way than being dependant on external registry sites for deployments.