Add test for page

tests/page.test.ts

@@ -0,0 +1,10 @@
+import { expect, test } from '@playwright/test';
+
+test('contains header text', async ({ playwright }) => {
+	const context = await playwright.request.newContext();
+	const response = await context.get('');
+	await expect(response.status()).toBe(200);
+
+	const body = (await response.body()).toString();
+	await expect(body).toContain('Gabi und Hannes Fotochallenge');
+});