Add initial script to add the retention labels to existing image

scripts/enforce_labels.bash

+#!/bin/bash
+
+image_name="$1"
+
+declare -A enforced_labels=( ["com.jfrog.artifactory.retention.maxCount"]="10" ["com.jfrog.artifactory.retention.maxDays"]="7")
+
+if ! docker inspect --type=image $1 > /dev/null ; then 
+    echo "Error: image does not exist"
+    exit 0
+fi
+
+for label in "${!enforced_labels[@]}" ; do     
+    if ! docker inspect -f "{{json .Config.Labels }}" $image_name | jq -e '.['\"$label\"']' ; then 
+        echo "Key not found" 
+        echo "$label = ${enforced_labels[$label]}"
+        label_args+=" --label $label=\"${enforced_labels[$label]}\""
+    fi    
+done
+
+if [ -v label_args ]; then 
+    run_command="echo \"FROM $image_name\" | docker build $label_args -t $image_name -"
+    eval "$run_command"
+fi