4 Change parameter names used to specify container tag method,
5 with a new default to use the fixed string 'latest' as a tag.
6 Merge two shell scripts into one instead of using Jenkins
8 Extend to accept a custom directory for the container-tag.yaml
9 if the yaml-file method is used to set the docker tag information;
10 this is an optional variable which is set to empty by default,
11 and falls back to DOCKER_ROOT.