DEP-12: convert compose files to 3.1. remove template. update bash script to create composite docker-files without extends. prevent overwriting manual changes to docker-comose.yml

#!/bin/bash
SSDT_HOME="$( dirname "${BASH_SOURCE[0]}")"
docker pull docker.ssdt.io/ssdt-utils
docker run -it -v $SSDT_HOME:/ssdt --rm docker.ssdt.io/ssdt-utils update ${1}