feat: add playwright e2e workflow

tests/e2e/health.spec.ts

@@ -0,0 +1,14 @@
+import { expect, test } from '@playwright/test';
+
+test.describe('health endpoint', () => {
+  test('returns a ready JSON payload', async ({ request }) => {
+    const response = await request.get('/api/health');
+
+    expect(response.ok()).toBeTruthy();
+    const payload = await response.json();
+    expect(payload).toMatchObject({
+      status: 'ok',
+      service: 'holiday-property-booking',
+    });
+  });
+});