adds playwright tests

web/tests/playwright/auth.setup.ts

@@ -0,0 +1,19 @@
+import { test as setup } from '@playwright/test';
+
+const authFile = 'playwright/.auth/user.json';
+
+setup('authenticate', async ({ page }) => {
+    await page.goto('/login', { waitUntil: 'networkidle' });
+    await page.locator('input[name="username"]').fill('Test');
+    await page.locator('input[name="password"]').fill('password');
+    await page.getByRole('button', { name: 'Login' }).click();
+    // Wait until the page receives the cookies.
+    //
+    // Sometimes login flow sets cookies in the process of several redirects.
+    // Wait for the final URL to ensure that the cookies are actually set.
+    await page.waitForURL('/');
+
+    // End of authentication steps.
+
+    await page.context().storageState({ path: authFile });
+});