Docker clean bash function

docker_clean.sh

#!/bin/bash

# define the function
function docker_clean {
    echo "Start cleaning..."

    process_count=$(docker ps -q | wc -l)
    if [ "$process_count" -ne "0" ]; then
        docker kill $(docker ps -q) > /dev/null
        echo "$process_count process/es had been clean"
    fi
    
    background_process_count=$(docker ps -a -q | wc -l)
    if [ "$background_process_count" -ne "0" ]; then
        docker rm -f $(docker ps -a -q) > /dev/null
        echo "$background_process_count background process/es had been clean"
    fi

    volumes_count=$(docker volume ls -q | wc -l)
    if [ "$volumes_count" -ne "0" ]; then
        docker volume rm -f $(docker volume ls -q) > /dev/null
        echo "$volumes_count volume/s had been clean"
    fi

    echo "Finish cleaning"
}

# call the function
docker_clean