message: docker-host - added environment variable PRUNE_IMAGES_UNTIL to prune-images.sh in order to tune the cutoff time for pruning images PRUNE_IMAGES_UNTIL
diff: @@ -4,5 +4,5 @@ if ! docker -H ${DOCKER_HOST} info &> /dev/null; then
  echo "could not connect to ${DOCKER_HOST}"; exit 1
  fi
  -# prune all images older than 7 days
  -docker image prune -af --filter "until=168h"
  +# prune all images older than 7 days or what is specified in the environment variable
  +docker image prune -af --filter "until=${PRUNE_IMAGES_UNTIL:-168h}"
  