Working Database setupgit add .

src/index.ts

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+import express from 'express';
+import cors from 'cors';
+import { disconnectDB } from './db';
+import { startSyncScheduler, stopSyncScheduler } from './jobs/sync-scheduler';
+
+// Import routes
+import usersRoutes from './routes/users.routes';
+import gradesRoutes from './routes/grades.routes';
+import statsRoutes from './routes/stats.routes';
+
+const app = express();
+const PORT = process.env.PORT || 4000;
+
+// Middleware
+app.use(cors());
+app.use(express.json());
+
+// Health check
+app.get('/health', (req, res) => {
+  res.json({
+    status: 'ok',
+    message: 'Skyward Backend API is running',
+    timestamp: new Date().toISOString(),
+  });
+});
+
+// Routes
+app.use('/api/users', usersRoutes);
+app.use('/api', gradesRoutes);
+app.use('/api/stats', statsRoutes);
+
+// 404 handler
+app.use((req, res) => {
+  res.status(404).json({
+    success: false,
+    error: 'Route not found',
+  });
+});
+
+// Start server
+app.listen(PORT, () => {
+  console.log(`\n🚀 Skyward Backend API running on port ${PORT}`);
+  console.log(`📡 Health check: http://localhost:${PORT}/health\n`);
+  
+  console.log('Available endpoints:');
+  console.log('  POST   /api/users/register');
+  console.log('  GET    /api/users');
+  console.log('  DELETE /api/users/:username');
+  console.log('  GET    /api/users/:username/grades');
+  console.log('  GET    /api/users/:username/classes');
+  console.log('  GET    /api/users/:username/classes/:category/assignments');
+  console.log('  GET    /api/users/:username/history');
+  console.log('  POST   /api/sync/manual');
+  console.log('  GET    /api/stats/overall');
+  console.log('  GET    /api/stats/users/:username');
+  console.log('  GET    /api/stats/users/:username/classes/:category\n');
+  
+  // Start background sync scheduler
+  startSyncScheduler();
+});
+
+// Graceful shutdown
+process.on('SIGINT', async () => {
+  console.log('\n\n[Server] Shutting down gracefully...');
+  stopSyncScheduler();
+  await disconnectDB();
+  process.exit(0);
+});
+
+process.on('SIGTERM', async () => {
+  console.log('\n\n[Server] Shutting down gracefully...');
+  stopSyncScheduler();
+  await disconnectDB();
+  process.exit(0);
+});