Modify workflow for playwright tests

.github/workflows/playwright.yml

@@ -8,19 +8,25 @@ jobs:
   test:
     timeout-minutes: 60
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: packages/nextjs
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
           node-version: lts/*
-      - name: Change directory
-        run: cd packages/nextjs
       - name: Install dependencies
         run: npm install -g yarn && yarn
       - name: Install Playwright Browsers
         run: yarn playwright install --with-deps
-      - name: Run Playwright tests
-        run: yarn playwright test
+      - name: Build Next.js app
+        run: yarn build
+      - name: Start Next.js app and run tests
+        run: |
+          yarn start & # Start in background
+          sleep 10 # Wait for server to start
+          yarn playwright test
       - uses: actions/upload-artifact@v4
         if: ${{ !cancelled() }}
         with: