Docker makes it easy to ship your applications and services in containers so you can run them anywhere. The more you work with Docker it’s also easy to accumulate a huge number of unused images, containers, and data volumes in your filesystem that clutter the output and consume a lot of precious disk space.
Docker, in new versions, gives you all the tools you need to clean up your system from the command line. This bash script creates a cron-job every day at 8am so it takes responsibility over keeping your system clean, freeing disk space and keeping your system organized by removing unused Docker images, containers, and volumes.