* Update docker-image.yml
towards tweaking script to use ghcr
* Update docker-image.yml
* Update docker-image.yml
* Update docker-image.yml
change usr/pwd to names that are more descriptive
* Update docker-image.yml
rename back to use DOCKER prefix
it remains to bind to ghcr.io instead of docker.io
* Update ubuntu-20-04.Dockerfile
try to use ghcr instead of docker.io
* Update docker-image.yml
try with chcr token
* Update docker-image.yml
* Update docker-image.yml
* Update docker-image.yml
* Update ubuntu-20-04.Dockerfile
* Update docker-image.yml