Script to fetch image configurations from hub

fetch.sh

#!/bin/sh

if [ "$#" -ne 2 ]; then
	echo "Wrong arguments, expect: <name> <tag>"
fi

IMAGE=$1
TAG=$2
TOKEN=$(curl -s "https://auth.docker.io/token?scope=repository:$IMAGE:pull&service=registry.docker.io" | jq -r .token)
CONFIG_DIGEST=$(curl -s -H"Accept: application/vnd.docker.distribution.manifest.v2+json" -H"Authorization: Bearer $TOKEN" "https://registry-1.docker.io/v2/$IMAGE/manifests/$TAG" | jq -r .config.digest)

CONFIG=$(curl -sL -H"Authorization: Bearer $TOKEN" "https://registry-1.docker.io/v2/$IMAGE/blobs/$CONFIG_DIGEST")

echo $CONFIG | jq '.'