Don't execute server from playwright

Apply fix from 55fa89c

.github/workflows/build.yml

@@ -124,6 +124,11 @@ jobs:
       run: |
         set -eux
         python -m pip install "jupyterlab>=4.0.0,<5" jupyterlab_search_replace*.whl
+    
+    - name: Launch JupyterLab
+      run: |
+        jlpm start 2>&1 > /tmp/jupyterlab_server.log &
+      working-directory: ui-tests
 
     - name: Install dependencies
       working-directory: ui-tests
@@ -143,6 +148,12 @@ jobs:
       run: jlpm playwright install chromium
       working-directory: ui-tests
 
+    - name: Wait for JupyterLab
+      uses: ifaxity/[email protected]
+      with:
+        resource: http-get://localhost:8888/lab
+        timeout: 360000
+
     - name: Execute integration tests
       working-directory: ui-tests
       run: |
@@ -157,6 +168,16 @@ jobs:
           ui-tests/test-results
           ui-tests/playwright-report
 
+    - name: Stop JupyterLab
+      if: always()
+      run: |
+        pkill -s SIGTERM jupyter-lab
+
+    - name: Print JupyterLab logs
+      if: always()
+      run: |
+        cat /tmp/jupyterlab_server.log
+
   check_links:
     name: Check Links
     runs-on: ubuntu-latest

ui-tests/playwright.config.js

@@ -1,14 +1,4 @@
 /**
  * Configuration for Playwright using default from @jupyterlab/galata
  */
-const baseConfig = require('@jupyterlab/galata/lib/playwright-config');
-
-module.exports = {
-  ...baseConfig,
-  webServer: {
-    command: 'jlpm start',
-    url: 'http://localhost:8888/lab',
-    timeout: 120 * 1000,
-    reuseExistingServer: !process.env.CI
-  }
-};
+module.exports = require('@jupyterlab/galata/lib/playwright-config');