Software is generally published online. Docker image repositories are generally online. The very act of building a Docker image pulling in dependencies is gener

Software is generally published online. Docker image repositories are generally online. The very act of building a Docker image pulling in dependencies is generally done online. It was a deep hack into the entirety of the Docker build chain. This way it was probably possible to publish experimental work-in-progress build features to the world at a faster pace than the official Docker release cycle. And as pointed out above, the online-only requirement has been lifted already. The situation is perfectly understandable, and to be commended that people offered to do this work for the betterment of all.