docker image prune --filter="dangling=true"
# Use this to delete everything:
docker system prune -a --volumes
# remove containers created between now upto 4hrs back
docker container prune --filter "until=4h"
# remove images created between now upto 4hrs back
docker image prune --filter "until=4h"
docker rmi $(docker images -f "dangling=true" -q)
docker rmi -f $(docker images -a -q)