Update koneksi.php untuk Coolify

config/koneksi.php

@@ -1,7 +1,12 @@
 <?php
-$koneksi = mysqli_connect("localhost", "root", "", "webgis");
+$host = getenv('DB_HOST') ?: "localhost";
+$user = getenv('DB_USER') ?: "root";
+$pass = getenv('DB_PASS') ?: ""; 
+$db   = getenv('DB_NAME') ?: "webgis";
+
+$koneksi = mysqli_connect($host, $user, $pass, $db);
 
 if (!$koneksi) {
-    die("Koneksi gagal: " . mysqli_connect_error());
+    die("Koneksi ke database gagal: " . mysqli_connect_error());
 }
 ?>