add playwright test setup

Dockerfile

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+FROM node:20-bookworm-slim
+ENV PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD=1
+
+WORKDIR /app
+COPY package*.json ./
+RUN npm install
+COPY . .
+EXPOSE 3000
+CMD ["npm", "run", "dev"]

package.json

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+{
+  "name": "harborforge-frontend-test",
+  "version": "1.0.0",
+  "scripts": {
+    "test": "playwright test",
+    "test:headed": "playwright test --headed"
+  },
+  "devDependencies": {
+    "@playwright/test": "^1.40.0"
+  }
+}

playwright.config.ts

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+import { defineConfig, devices } from '@playwright/test';
+
+export default defineConfig({
+  testDir: './tests',
+  fullyParallel: true,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 2 : 0,
+  workers: process.env.CI ? 1 : undefined,
+  reporter: 'html',
+  use: {
+    baseURL: 'http://127.0.0.1:3000',
+    trace: 'on-first-retry',
+  },
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+  ],
+  webServer: {
+    command: 'npm run dev',
+    url: 'http://127.0.0.1:3000',
+    reuseExistingServer: !process.env.CI,
+  },
+});

tests/example.spec.ts

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+import { test, expect } from '@playwright/test';
+
+test('has title', async ({ page }) => {
+  await page.goto('/');
+  await expect(page).toHaveTitle(/HarborForge/);
+});