Automate Term Graph Loader build

[ibmatc]

Term Graph loading was added as a Docker container in the fhir-install module via #2795. The process requires a build script to automate the build of the image

I believe the pattern used by ibm-fhir-schematool can be followed here to script the build and add it to the release process.
The nuances of this pattern are complex so I excluded it from the initial release of the Term Graph loader code.

Without this update, the Term Graph Loader container will not remain up-to-date and may result in out-of-date images being used in future releases.

Acceptance Criteria
1.
GIVEN a new release of FHIR
WHEN a build is initiated
THEN a new version of the term-graph-loader image will be built and pushed to the docker repository

This approach was discussed with @prb112 and agreed to be a reasonable direction.

[prb112]

Docker repository such as ibm-fhir-term-loader
Automation would follow similar to ibm-fhir-schematool

[prb112]

Pinged Adam asking for confirmation this meets his expectations and we can close out QA

[prb112]

Fixed issue in #2930
QA Complete - Adam was able to load data using the container