<?php
declare(strict_types=1);
header('Content-Type: text/plain; charset=utf-8');
header('X-Robots-Tag: noindex, nofollow', true);

try {
    require_once __DIR__ . '/db/config.php';
    db()->query('SELECT 1');
    http_response_code(200);
    echo "OK\n";
} catch (Throwable $e) {
    http_response_code(500);
    echo "DB_ERROR\n";
}