Security: Move database credentials to separate config file

db.config.example.js

@@ -0,0 +1,13 @@
+// Database Configuration File
+// IMPORTANT: This file contains sensitive credentials and should NEVER be committed to git
+// Copy this file to db.config.js and update with your actual database credentials
+
+module.exports = {
+    host: 'your-database-host.com',
+    user: 'your-database-username',
+    password: 'your-secure-password',
+    database: 'your-database-name',
+    waitForConnections: true,
+    connectionLimit: 10,
+    queueLimit: 0
+};