Motivation:
When creating entities, we must always create a get() and add() function for each entity. This ensures that any object of that entity type can be accessed/created anywhere in the class.

Acceptance Criteria:

• Create an API route that returns the information for all applications (GET ROUTE)
• Create an API route that returns the information for one specific application (GET ROUTE)
• Create an API route that adds a new application to the database (POST ROUTE)