Improve MongoDB Connection Handling

[Renzo-codespace]

Improve MongoDB Connection Handling:

• [x] Import MongoClient from the mongodb package ONLY ONCE in the ENTIRE PROJECT
• [x] Instantiate an instance of the client ONLY ONCE in the ENTIRE PROJECT
• [x] Instantiate the client at the TOP LEVEL of the module, NEVER IN A FUNCTION that returns an instance of the client
• [x] Import the client instance to other modules ONLY in your DATABASE LAYER
• [x] NEVER import the client instance to your API MODULES; ONLY import the FUNCTIONS from the database layer
• [x] NEVER import the client into any COMPONENTS OR PAGES; ONLY FUNCTIONS from the database layer or CREATE CALLS to the API layer
• [x] Database layer functions in components or pages MUST ONLY EVER RUN AS SERVER-SIDE CODE

[Renzo-codespace]

The solution to this issue must be demonstrated before it can be considered as done.

[Renzo-codespace]

I like checking boxes