Added migration file

src/Database/Migration.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Database;
+
+use Medoo\Medoo;
+
+final class Migration
+{
+    public static function run(Medoo $db): void
+    {
+        $db->pdo->exec("
+            CREATE TABLE IF NOT EXISTS post (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                title TEXT NOT NULL,
+                content TEXT NOT NULL,
+                slug TEXT UNIQUE NOT NULL DEFAULT '',
+                created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+                updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+            )
+        ");
+    }
+}