Overview
Express route for portal to retrieve event data from firebase

Details
Currently, there only exists a portalFunction to record and modify event data, but none to retrieve and read. This new express route will allow portal to retrieve and display event data in the firebase collections.

Task List

• Add API route to express_portal.ts (must match portal route used for authentication)
• Build script function to retrieve event firebase data

Additional context
Note that this express route will be utilized by portal under api/actions/event.ts to authorize this data retrieval.