refactor back end and make routing modular

[gitgc]

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[Copilot]

Pull Request Overview

This PR refactors the backend codebase by extracting the monolithic index.js file into modular components, improving code organization and maintainability. The main purpose is to reorganize routes, utilities, and configuration into separate modules.

• Extracts authentication, leaderboard, and race settings routes into separate route modules
• Creates utility modules for database operations, file management, and app configuration
• Moves upload middleware to its own module for better reusability

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/utils/fileManager.js	Centralizes file operations including deletion and path management
src/utils/database.js	Extracts database initialization and race expiration logic
src/utils/appConfig.js	Consolidates Express app configuration and middleware setup
src/routes/raceSettings.js	Implements race settings endpoints as a separate router module
src/routes/leaderboard.js	Implements leaderboard endpoints as a separate router module
src/routes/auth.js	Implements authentication endpoints as a separate router module
src/middleware/upload.js	Extracts multer upload configuration into reusable middleware
src/index.js	Simplified main entry point that imports and mounts modular components

[Copilot]

The empty catch block silently swallows database initialization errors. This could hide critical startup issues. Consider logging the error or re-throwing it to ensure database connection problems are visible.

Suggested change

	} catch (_error) {}
	} catch (_error) {
	console.error('Database initialization error:', _error);
	}