added deployment file

docker/health.php

@@ -0,0 +1,17 @@
+<?php
+header('Content-Type: text/plain; charset=utf-8');
+header('Cache-Control: no-store');
+try {
+    require '/var/www/html/includes/conn.php';
+    // A database connection alone is insufficient: the initial import and
+    // migrations must also be present before this instance is ready for users.
+    foreach (['in_daper', 'in_soal', 'in_jawab', 'rec_admin', 'rec_exam_attempt', 'rec_exam_event', 'rec_candidate_login_guard'] as $table) {
+        $conn->query("SELECT 1 FROM `$table` LIMIT 0");
+    }
+    $conn->query('SELECT email, nama_de, nama_be, idkar, password_hash FROM rec_admin LIMIT 0');
+    echo "ok\n";
+} catch (Throwable $error) {
+    http_response_code(503);
+    // Never expose connection details, credentials, or schema errors over HTTP.
+    echo "not ready\n";
+}