Add Playwright configuration file

playwright.config.js

@@ -0,0 +1,46 @@
+// @ts-check
+const { defineConfig, devices } = require('@playwright/test');
+
+/**
+ * @see https://playwright.dev/docs/test-configuration
+ */
+module.exports = defineConfig({
+  testDir: './tests',
+  timeout: 30 * 1000,
+  expect: {
+    timeout: 5000
+  },
+  fullyParallel: true,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 2 : 0,
+  workers: process.env.CI ? 1 : undefined,
+  reporter: 'html',
+  
+  use: {
+    actionTimeout: 0,
+    trace: 'on-first-retry',
+    baseURL: 'http://localhost:8080',
+    screenshot: 'only-on-failure',
+  },
+
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+    {
+      name: 'firefox',
+      use: { ...devices['Desktop Firefox'] },
+    },
+    {
+      name: 'webkit',
+      use: { ...devices['Desktop Safari'] },
+    },
+  ],
+
+  webServer: {
+    command: 'node tests/serve.js',
+    port: 8080,
+    reuseExistingServer: true,
+  },
+});