Create Accont index to optimize queries on list endpoint

[Kmario19]

This pull request includes changes to improve the security of environment variables and enhance the performance of database queries. The most important changes include updating the MongoDB URI to use placeholders for sensitive information and adding an index to the Account schema to optimize query performance.

Security improvements:

• .env.example: Updated the MONGODB_URI to use placeholders for the username and password to avoid hardcoding sensitive information.

Database performance enhancements:

• src/models/Account.ts: Added an index to the Account schema to improve the performance of queries involving the name, balance, and createdAt fields.

[Copilot]

Pull Request Overview

This pull request improves database query performance by adding a compound index to the Account schema and enhances security by updating the MongoDB URI placeholders in configuration.

• Updated the MongoDB URI to replace hardcoded credentials with placeholders.
• Added a compound index in the Account model on name, balance, and createdAt fields.

Files not reviewed (1)

• .env.example: Language not supported

Comments suppressed due to low confidence (1)

src/models/Account.ts:35

• [nitpick] Verify that the descending order for the 'createdAt' field (-1) aligns with the query patterns. If queries require ascending order, update the index accordingly.

accountSchema.index({ name: 1, balance: 1, createdAt: -1 });