You only need one line to run HiveMQ CE as a Docker container: docker run -name hivemq-ce -d -p 1883:1883 hivemq/hivemq-ce:snapshot. The HiveMQ team is pleased to announce the availability of HiveMQ Community Edition as a Docker image on Docker Hub. You can think of the registry as a directory of all available Docker images. Docker Hub - A registry of Docker images.
More generally, there can be other forms of clients too - such as Kitematic which provide a GUI to the users. Docker Client - The command line tool that allows the user to interact with the daemon. You can get a real time understanding of your current usage right from. Here are the steps you can follow to understand and manage usage for anonymous and free usage of Docker Hub in your app development process: Understand your Docker Hub usage.
NOTE: Docker Pro and Docker Team accounts enable 5,000 pulls in a 24 hour period from Docker Hub.