Features/ci integration

[anilnatha]

Purpose

Add CI/CD to the unity-ui application to build the application as a container.

Note: Additional work is still needed to resolve SSM param integration. This ticket was to get the CI/CD functional.

Proposed Changes

• [ADD] CI/CD workflow to build application as a docker image.
• [FIXED] Removed stateful information from project configuration by allowing environment variables to be supplied to the container at startup which in turn get injected into the Unity UI Codebase. This is in support of moving to dynamic configuration of the application via Unity Marketplace.

  Issues

• 21

  Testing

• Tested build using local Docker Desktop
• Tested workflow by using the workflow against a feature branch to test it's ability to be executed when the branch is updated
• Tested environment variable injection by building and running docker image using Docker Desktop and passing environment variables through docker run arguments which models how AWS ECS will also inject ENV vars

[anilnatha]

@rtapella I've pushed modifications in support of environment variable injection so that when marketplace stands up the UI, it can inject configuration information into the application (e.g. WPST URL, Cognito URLs, etc.).

Luckily I was also able to figure out how to retain the normal development tooling using the typical npm run dev command, but the docker image that is built by our CI/CD can also be built locally for testing which will be helpful.

Can you please review again when you have a chance so that we can cut a release. I'll have to circle back and add documentation to the README.