fix: ganti koneksi PDO ke MySQLi dan perbaiki DB_HOST Coolify

Web GIS Layer/config.php

@@ -5,7 +5,6 @@ $port    = getenv('DB_PORT') ?: 3306;
 $db      = getenv('DB_NAME') ?: 'default';
 $user    = getenv('DB_USER') ?: 'mysql';
 $pass    = getenv('DB_PASS') ?: 'tg9lvPlr4hgUhgtT7aPq9XelkCEvvMGtsoV8eB4dD5FAkz891PwkJT340xmaEWxL';
-$charset = 'utf8mb4';
 
 // Direktori upload foto laporan
 define('UPLOAD_DIR', __DIR__ . '/uploads/');
@@ -15,30 +14,22 @@ if (session_status() === PHP_SESSION_NONE) {
     session_start();
 }
 
-// Koneksi PDO
-try {
-    $pdo = new PDO(
-        "mysql:host={$host};port={$port};dbname={$db};charset={$charset}",
-        $user,
-        $pass,
-        [
-            PDO::ATTR_ERRMODE                      => PDO::ERRMODE_EXCEPTION,
-            PDO::ATTR_DEFAULT_FETCH_MODE           => PDO::FETCH_ASSOC,
-            PDO::ATTR_EMULATE_PREPARES             => false,
-            PDO::MYSQL_ATTR_SSL_VERIFY_SERVER_CERT => false,
-        ]
-    );
-} catch (PDOException $e) {
+// Koneksi MySQLi
+$conn = new mysqli($host, $user, $pass, $db, (int)$port);
+
+if ($conn->connect_error) {
     http_response_code(500);
     header('Content-Type: application/json; charset=utf-8');
     echo json_encode([
         'success' => false,
         'data'    => null,
-        'message' => 'Koneksi database gagal: ' . $e->getMessage()
+        'message' => 'Koneksi database gagal: ' . $conn->connect_error
     ]);
     exit;
 }
 
+$conn->set_charset('utf8mb4');
+
 /**
  * Sanitasi input string.
  */
@@ -46,3 +37,14 @@ function clean(string $value): string
 {
     return htmlspecialchars(strip_tags(trim($value)));
 }
+
+/**
+ * Kirim respon JSON lalu hentikan eksekusi.
+ */
+function jsonResponse(array $data, int $httpCode = 200): void
+{
+    http_response_code($httpCode);
+    header('Content-Type: application/json; charset=utf-8');
+    echo json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+    exit;
+}