Regularly clean your dangling containers and images.

Step 1: cleaning containers (don’t worry, it destroys only stopped containers)

docker ps -aq| xargs docker rm

Step 2: removing dangling images

docker rmi $(docker images -q --filter "dangling=true")

Docker itself offers a number of tools to prune and clean up space

1. Inspecting docker filesystem: docker system df
2. Pruning stopped containers: docker container prune
3. Removing all unused local volumes: docker volume prune
4. docker system prune will remove
   • all stopped containers
   • all networks not used by at least one container
   • all dangling images
   • all dangling build cache