Add docker-compose merge file for production build

[rmunn]

Fixes #1821

Description

This will allow the default docker-compose.yml file to build the development build, but allow passing an extra -f flag to docker compose in order to build the production build instead. (This is the Docker Compose equivalent of kustomize, though a little easier to use and understand than kustomize).

Screenshots

Demonstrate any UI / behavioral changes with screenshots or animations.

Checklist

• [X] I have labeled my PR with: bug, feature, engineering, security fix or testing
• [X] I have performed a self-review of my own code
• [X] I have reviewed the title & description of this PR which I will use as the squashed PR commit message
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have enabled auto-merge (optional)

Testing

Testers, use the following instructions against our staging environment. Post your findings as a comment and include any meaningful screenshots, etc.

Describe how to verify your changes and provide any necessary test data.

• Check PR, make sure tests still pass
• Edit your Makefile and change the docker compose build steps to include -f docker-compose.yml -f docker-compose.production.yml and make sure running various make commands still works.

[github-actions[bot]]

Unit Test Results

362 tests   362 :white_check_mark:  13s :stopwatch:  37 suites    0 :zzz:   1 files      0 :x:

Results for commit 02a1e51b.

:recycle: This comment has been updated with latest results.