Refactor code structure for improved readability and maintainability

reference/code-index-mcp-master/test/sample-projects/javascript/user-management/.env.example

@@ -0,0 +1,29 @@
+# Server Configuration
+PORT=3000
+NODE_ENV=development
+
+# Database Configuration
+MONGODB_URI=mongodb://localhost:27017/user-management
+
+# JWT Configuration
+JWT_SECRET=your-super-secret-jwt-key-here
+JWT_EXPIRES_IN=24h
+
+# CORS Configuration
+ALLOWED_ORIGINS=http://localhost:3000,http://localhost:3001
+
+# Logging Configuration
+LOG_LEVEL=info
+
+# Rate Limiting Configuration
+RATE_LIMIT_WINDOW_MS=900000
+RATE_LIMIT_MAX_REQUESTS=100
+
+# Password Configuration
+BCRYPT_SALT_ROUNDS=12
+
+# Email Configuration (if implementing email features)
+# SMTP_HOST=smtp.gmail.com
+# SMTP_PORT=587
+# SMTP_USER=your-email@gmail.com
+# SMTP_PASS=your-app-password