Use VM database environment

db/config.php

@@ -1,21 +1,34 @@
 <?php
-// Generated by setup_mariadb_project.sh — edit as needed.
 date_default_timezone_set('America/Lima');
-define('DB_HOST', '127.0.0.1');
-define('DB_NAME', 'app_30953');
-define('DB_USER', 'app_30953');
-define('DB_PASS', 'e45f2778-db1f-450c-99c6-29efb4601472');
+
+if (!function_exists('required_env')) {
+  function required_env($key) {
+    $value = getenv($key);
+    if ($value === false || $value === '') {
+      throw new RuntimeException('Missing required environment variable: ' . $key);
+    }
+
+    return $value;
+  }
+}
+
+define('DB_HOST', required_env('DB_HOST'));
+define('DB_NAME', required_env('DB_NAME'));
+define('DB_USER', required_env('DB_USER'));
+define('DB_PASS', required_env('DB_PASS'));
 
 if (!function_exists('db')) {
   function db() {
     static $pdo;
+
     if (!$pdo) {
-      $pdo = new PDO('mysql:host='.DB_HOST.';dbname='.DB_NAME.';charset=utf8mb4', DB_USER, DB_PASS, [
+      $pdo = new PDO('mysql:host=' . DB_HOST . ';dbname=' . DB_NAME . ';charset=utf8mb4', DB_USER, DB_PASS, [
         PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
         PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
       ]);
       $pdo->exec("SET time_zone = '-05:00'");
     }
+
     return $pdo;
   }
-}
+}