shell script that lists all tags of a given image, inspired by [answer](https://stackoverflow.com/a/39454426)

docker-tags

#!/usr/bin/env bash

image="$1"

if [ -z "$image" ]; then
    echo "usage: script-name full-image-name"
    exit 1
fi

declare -A tags

for i in $(wget -q https://registry.hub.docker.com/v1/repositories/${image}/tags -O - \
    | python -m json.tool \
    | sed -n '/name/p' | awk '{ print $2 }' | tr -d '"' \
    | sort -h | uniq);
    do

    tag_index="$(expr $i : '\(^[0-9a-zA-Z]\+\)')"
    tags["$tag_index"]=$(echo "${tags[$tag_index]}, ${i}" | sed 's/^, //')

done

for j in "${tags[@]}"; do
    echo $j
    echo
done