feat: Add Express.js TypeScript API scaffolding

[manziosee]

🚀 Express.js TypeScript API Scaffolding

Description

Complete implementation of Express.js API scaffolding with TypeScript conversion for StackGenie backend. This establishes a solid, type-safe foundation for the AI-powered fullstack app generator.

✅ Changes Made

• TypeScript Conversion: Migrated entire API from JavaScript to TypeScript with strict typing
• Project Structure: Created professional folder organization (controllers, routes, middlewares, types)
• Health Check Endpoint: Implemented /api/health with comprehensive status response
• Error Handling: Added centralized error middleware with custom TypeScript types
• Security & Logging: Configured Helmet, CORS, and Morgan middleware
• Development Workflow: Set up ts-node, nodemon, and build processes
• Environment Config: Added .env support with all necessary variables
• Type Definitions: Comprehensive TypeScript interfaces for all API entities
• Documentation: Updated README with TypeScript setup and usage instructions

🛠 Technical Stack

• TypeScript with ES2020 target
• Express.js with type-safe routing
• Morgan for request logging
• Helmet for security headers
• CORS for cross-origin support
• Nodemon + ts-node for development

📋 Acceptance Criteria Met

• Express.js project initialized with TypeScript
• Folder structure created (src/, routes/, controllers/, middlewares/)
• Environment variables managed with .env
• Health-check route returns { status: "ok" }
• Error handling middleware implemented
• Logging middleware (Morgan) added
• Development server with npm run dev

🧪 Testing

npm run dev
curl http://localhost:5000/api/health