added development environment

app/public/index.php

@@ -0,0 +1,8 @@
+<?php
+$pdo = new PDO('mysql:dbname=tutorial;host=mysql', 'grisu', 'secret', [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
+
+$query = $pdo->query('SHOW VARIABLES like "version"');
+
+$row = $query->fetch();
+
+echo 'MySQL version:' . $row['Value'];