Example using the GHCR.IO registry to get Docker Image labels

ghcr-config.sh

#!/usr/bin/env bash

IMAGE="terascope/node-base"
TAG="22"

TOKEN=$(curl -sS https://ghcr.io/token\?scope\="repository:${IMAGE}:pull" | jq -r .token)
# echo $TOKEN

# get digest of 'amd64' image
DIGEST=$(curl -s -H "Authorization: Bearer ${TOKEN}" \
     -H "Accept: application/vnd.oci.image.index.v1+json, application/vnd.docker.distribution.manifest.v2+json" \
     https://ghcr.io/v2/$IMAGE/manifests/${TAG} | jq -r '.manifests[] | select(.platform.architecture=="amd64") | .digest')

# echo $DIGEST


CONFIG_DIGEST=$(curl -s -H "Authorization: Bearer ${TOKEN}" \
     -H "Accept: application/vnd.oci.image.manifest.v1+json" \
     https://ghcr.io/v2/${IMAGE}/manifests/${DIGEST} | jq -r .config.digest)

# echo $CONFIG_DIGEST

curl -s -L -H "Authorization: Bearer $TOKEN" \
     -H "Accept: application/vnd.oci.image.config.v1+json" \
     https://ghcr.io/v2/${IMAGE}/blobs/${CONFIG_DIGEST} | jq -r '.config.Labels.["io.terascope.image.node_version"]'

Actually this command retrieves a specific label from the image.