Docker is a popular tool that has become synonymous with containers. Docker can build images and run containers. The tool also allows its users to upload their docker images to Docker Hub – the container image registry from Docker Inc. that helps share images. Docker Hub allows free public repositories for images.
During this research, we found more than 1.6 million unique user accounts on Docker Hub. There are more than 6.3 million public repositories at the time of writing this blog.