Create mechanism for multiple separate app/site deploys

[krook]

May share a common template repo, and have custom code in other repos.

This will probably be multi-phased:

• One build for NGINX, PHP-FPM, PHP-CLI images
• One build for Drupal (plus sites, themes, modules)
• One build for custom custom code
• One build for regional custom code

[odrodrig]

One build for NGINX, PHP-FPM, PHP-CLI images

• One build for Drupal (plus sites, themes, modules)
• One build for custom custom code
• One build for regional custom code

The nginx/php builds have been configured in the pipeline. Until we get repos for the other 3 builds, I can't build those pipelines.

[krook]

Multiple builds and multiple environments are implemented.