Basic Docker script to Save a docker image as .tar file

docker-save.sh

while getopts :i:v:p opt; do
    case $opt in
        i) IMAGE=$OPTARG
        ;;
        v) VERSION=$OPTARG
        ;;
        \?) echo "Unknown option: -$OPTARG" >&2
            exit 1
        ;;
    esac
done

FILENAME=$(echo $IMAGE | tr / _)

docker pull $IMAGE:$VERSION
docker save -o $FILENAME:$VERSION.tar $IMAGE:$VERSION