added deployment file

docker/migrate.php

@@ -0,0 +1,33 @@
+<?php
+if (PHP_SAPI !== 'cli') {
+    http_response_code(404);
+    exit;
+}
+
+try {
+    require '/var/www/html/includes/conn.php';
+    foreach (['in_daper', 'in_soal', 'in_jawab'] as $table) {
+        $conn->query("SELECT 1 FROM `$table` LIMIT 0");
+    }
+
+    foreach (['001_admin.sql', '002_admin_identity.sql', '003_exam_attempts.sql'] as $file) {
+        // Only migrate the historical rec_admin schema, preserving identities.
+        if ($file === '002_admin_identity.sql'
+            && $conn->query("SHOW COLUMNS FROM rec_admin LIKE 'name'")->num_rows === 0) {
+            continue;
+        }
+        $sql = file_get_contents('/var/www/html/dashboard/migrations/' . $file);
+        $conn->multi_query($sql);
+        do {
+            $result = $conn->store_result();
+            if ($result instanceof mysqli_result) {
+                $result->free();
+            }
+        } while ($conn->more_results() && $conn->next_result());
+        fwrite(STDOUT, "Applied: $file\n");
+    }
+    fwrite(STDOUT, "Database ready. Existing accounts and test data were preserved.\n");
+} catch (Throwable $error) {
+    fwrite(STDERR, 'Migration failed: ' . $error->getMessage() . "\nImport the base database first; see docs/deployment.md.\n");
+    exit(1);
+}