## Issue #10: Implement Rate Limiting

### Description

Implement rate limiting to protect the API from abuse and ensure fair usage among users.

### Acceptance Criteria

- [ ] Configure rate limiting middleware
- [ ] Define rate limits for different endpoints
- [ ] Add logging for rate limit violations
- [ ] Allow configuration of limits via environment variables
- [ ] Ensure legitimate users are not affected by limits

### Tasks

- [ ] Install and configure express-rate-limit middleware
- [ ] Define default rate limits
- [ ] Implement configurable limits via .env file
- [ ] Add logging for rate limit hits
- [ ] Test rate limiting functionality

### Notes

This issue addresses the need to protect the API from abuse through rate limiting. The implementation will use express-rate-limit middleware to configure different rate limits for various endpoints, with configuration via environment variables to allow easy adjustment without code changes.