[Official documentation for docker image prune](https://docs.docker.com/engine/reference/commandline/image_prune/)

prune_unused_docker_images.sh

#!/bin/bash

# Prune all unused images
docker image prune --all

# The filtering flag (--filter) format is of “key=value”. If there is more than one filter, then pass multiple flags
docker image prune --filter "foo=bar"
# For more details on the filter flag option see official documentation mentioned in the description

# Prune all unused images with no confirmation
docker image prune --all --force