chore: remove db credentials from tracking and add template file

lib/db-config.template.js

@@ -0,0 +1,11 @@
+// Database Configuration Template
+// Copy this file to lib/db-config.js and update with your actual credentials
+// NEVER commit lib/db-config.js to Git - it's in .gitignore for security
+
+module.exports = {
+  host: 'YOUR_DATABASE_HOST',        // e.g., 'localhost' or '172.16.69.219'
+  user: 'YOUR_DATABASE_USER',        // e.g., 'postgres'
+  password: 'YOUR_DATABASE_PASSWORD', // Database password
+  database: 'YOUR_DATABASE_NAME',    // e.g., 'webperformance'
+  port: 5432,                        // Default PostgreSQL port
+};