add changes

backend/server.js

@@ -7,7 +7,7 @@ const swaggerSpec = require('./config/swagger');
 const logger = require('./config/logger');
 const { errorHandler, notFoundHandler } = require('./middleware/errorHandler');
 const { testConnection, getDatabaseStats } = require('./config/db');
-const { validateEnvironment } = require('./validate-env');
+const { validateEnvironment } = require('./tests/validate-env');
 const { isRedisConnected } = require('./config/redis');
 
 // Security middleware
@@ -88,7 +88,7 @@ app.get('/api-docs.json', docsLimiter, (req, res) => {
 // Health check endpoint
 app.get('/health', async (req, res) => {
   const dbStats = await getDatabaseStats();
-  
+
   res.status(200).json({
     status: 'OK',
     message: 'Interview Quiz API is running',
@@ -133,9 +133,9 @@ app.use(errorHandler);
 // Start server
 app.listen(PORT, async () => {
   logger.info('Server starting up...');
-  
+
   const redisStatus = isRedisConnected() ? '✅ Connected' : '⚠️  Not Connected (Optional)';
-  
+
   console.log(`
 ╔════════════════════════════════════════╗
 ║   Interview Quiz API - MySQL Edition  ║
@@ -149,16 +149,16 @@ app.listen(PORT, async () => {
 📝 Logs: backend/logs/
 💾 Cache (Redis): ${redisStatus}
   `);
-  
+
   logger.info(`Server started successfully on port ${PORT}`);
-  
+
   // Test database connection on startup
   console.log('🔌 Testing database connection...');
   const connected = await testConnection();
   if (!connected) {
     console.warn('⚠️  Warning: Database connection failed. Server is running but database operations will fail.');
   }
-  
+
   // Log Redis status
   if (isRedisConnected()) {
     console.log('💾 Redis cache connected and ready');