React App Configuration Externalization

[3dxp]

Allow react application """environment variable""" externalization. This allows us to set react variables at runtime.

Acceptance Criteria:

• When the client application is launched, runtime variables can be changed without having to recompile the application.

Task List:

• [ ] Update create react app to include vars from window.
• [ ] Provide method to set window variables.

[3dxp]

Talked to @sjiang1 and got permission to remove this from sprint one. This will return later, but due to the current development strategy was no longer required for the sprint.