Implement integration tests with Playwright

playwright.config.ts

@@ -0,0 +1,42 @@
+import { defineConfig, devices } from '@playwright/test';
+import path from 'path';
+
+const PORT = 3000;
+const baseURL = `http://localhost:${PORT}`;
+
+export default defineConfig({
+    testDir: './tests',
+    fullyParallel: true,
+    forbidOnly: !!process.env.CI,
+    /* Maximum time one test can run for. */
+    timeout: 60 * 1000,
+    expect: {
+        timeout: 20000
+    },
+    retries: process.env.CI ? 2 : 0,
+    workers: process.env.CI ? 1 : undefined,
+    reporter: 'html',
+    use: {
+        baseURL,
+        trace: 'on-first-retry',
+    },
+    projects: [
+        {
+            name: 'chromium',
+            use: { ...devices['Desktop Chrome'] },
+        },
+        {
+            name: 'firefox',
+            use: { ...devices['Desktop Firefox'] },
+        },
+        {
+            name: 'webkit',
+            use: { ...devices['Desktop Safari'] },
+        },
+    ],
+    webServer: {
+        command: 'npm run dev',
+        url: baseURL,
+        reuseExistingServer: !process.env.CI,
+    },
+});