шаг 1 сделан

public/index.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Core\Database;
+
+require_once dirname(__DIR__) . '/app/bootstrap.php';
+
+$dbStatus = 'not_checked';
+
+try {
+    Database::pdo()->query('SELECT 1');
+    $dbStatus = 'connected';
+} catch (Throwable $exception) {
+    $dbStatus = app_env('APP_DEBUG', 'false') === 'true'
+        ? 'error: ' . $exception->getMessage()
+        : 'error';
+}
+
+view('pages/home', [
+    'title' => 'Рыбсток',
+    'dbStatus' => $dbStatus,
+]);