The Docker Hub
In the previous section, when you ran the docker pull subcommand, the busybox image got downloaded mysteriously. In this section, let's unravel the mystery around the docker pull subcommand and how the Docker Hub immensely contributed toward this unintended success.
The good folks in the Docker community have built a repository of images and they have made it publicly available at a default location, index.docker.io. This default location is called the Docker Hub. The docker pull subcommand is programmed to look for images at this location. Thus, when you pull a busybox image, it is effortlessly downloaded from the default registry. This mechanism helps in speeding up the spinning of Docker containers. The Docker Hub is the ...
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