Add testing utilities and project summary

- Added database connection test script
- Created project completion summary
- Included quick start guide and documentation

test-connection.js

@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+
+import { connectDB } from './src/config/database.js';
+import { Customer, User, Plan } from './src/models/index.js';
+
+const testConnection = async () => {
+  try {
+    console.log('🔄 Testing database connection...');
+    
+    // Test database connection
+    await connectDB();
+    console.log('✅ Database connection successful');
+    
+    // Test models
+    const userCount = await User.count();
+    const customerCount = await Customer.count();
+    const planCount = await Plan.count();
+    
+    console.log(`📊 Statistics:`);
+    console.log(`   - Users: ${userCount}`);
+    console.log(`   - Customers: ${customerCount}`);
+    console.log(`   - Plans: ${planCount}`);
+    
+    if (userCount === 0) {
+      console.log('⚠️  No users found. Run "npm run migrate" to create sample data.');
+    }
+    
+    console.log('✅ All tests passed!');
+    process.exit(0);
+    
+  } catch (error) {
+    console.error('❌ Test failed:', error.message);
+    
+    if (error.name === 'SequelizeConnectionError') {
+      console.error('💡 Database connection failed. Please check:');
+      console.error('   - MySQL server is running');
+      console.error('   - Database credentials in .env file');
+      console.error('   - Database exists');
+    }
+    
+    process.exit(1);
+  }
+};
+
+testConnection();