Set up backend API server with Express and Prisma

- Initialize Node.js/Express backend project structure
- Configure TypeScript for backend development
- Set up Prisma ORM with MySQL database schema
- Implement authentication middleware with Clerk
- Create photo upload endpoint with EXIF extraction
- Build report CRUD endpoints (create, read, delete)
- Add file upload handling with Multer
- Configure CORS and security middleware (helmet)
- Set up error handling and validation
- Create development environment configuration

Task 21 complete: Backend foundation ready for report submissions

server/src/index.ts

@@ -0,0 +1,66 @@
+import express from 'express';
+import cors from 'cors';
+import helmet from 'helmet';
+import dotenv from 'dotenv';
+import path from 'path';
+import reportRoutes from './routes/reportRoutes';
+
+// Load environment variables
+dotenv.config();
+
+const app = express();
+const PORT = process.env.PORT || 3000;
+
+// Middleware
+app.use(helmet());
+app.use(cors({
+  origin: process.env.CORS_ORIGIN || 'http://localhost:5173',
+  credentials: true,
+}));
+app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
+
+// Serve uploaded files
+app.use('/uploads', express.static(path.join(__dirname, '../uploads')));
+
+// Health check
+app.get('/health', (req, res) => {
+  res.json({ status: 'ok', timestamp: new Date().toISOString() });
+});
+
+// API Routes
+app.use('/api/reports', reportRoutes);
+
+// Error handling middleware
+app.use((err: any, req: express.Request, res: express.Response, next: express.NextFunction) => {
+  console.error('Error:', err);
+  
+  if (err.name === 'MulterError') {
+    if (err.code === 'LIMIT_FILE_SIZE') {
+      return res.status(400).json({
+        error: {
+          code: 'FILE_TOO_LARGE',
+          message: 'File size exceeds the maximum limit of 5MB',
+          timestamp: new Date().toISOString(),
+        },
+      });
+    }
+  }
+
+  res.status(500).json({
+    error: {
+      code: 'INTERNAL_SERVER_ERROR',
+      message: err.message || 'An unexpected error occurred',
+      timestamp: new Date().toISOString(),
+    },
+  });
+});
+
+// Start server
+app.listen(PORT, () => {
+  console.log(`🚀 Server running on port ${PORT}`);
+  console.log(`📍 Environment: ${process.env.NODE_ENV || 'development'}`);
+  console.log(`🔗 API: http://localhost:${PORT}/api`);
+});
+
+export default app;