Docker Cleanup for dangling images and volumes, but keep named volumes

docker-cleanup.sh

#!/bin/bash
  
RC=0

IMAGES=($(docker images -q -f dangling=true))
VOLUMES=($(docker volume ls -q -f dangling=true))

if [ "${#IMAGES[@]}" -ne 0 ]; then
    for image in "${IMAGES[@]}"
    do
        echo "Deleting dangling image $image ..."
        docker rmi $image
        if [ $? -ne 0 ]; then
            RC=1
        fi
    done
fi

if [ "${#VOLUMES[@]}" -ne 0 ]; then
    for volume in "${VOLUMES[@]}"
    do
        if echo "$volume" | grep -qP "[a-f0-9]{64}"; then
            echo "Deleting dangling volume $volume ..."
            docker volume rm "$volume"
            if [ $? -ne 0 ]; then
                RC=1
            fi
        else
            echo "NOT cleaning named volume: $volume"
        fi
    done
fi


exit $RC