Update folder structure

[cfnyu]

As a Developer
I need to update the folder structure of the application
So that there is a clear division of where all code lives in the project

Assumptions:

• The API service will live in a folder labeled App
• All unit tests will be stored in a folder labeled Tests
• All Integration Tests will be stored in a folder labeled features
• All application configuration and environment setup will live in the root directory

Acceptance Criteria:

Given ...
When ...
Then ...