upload playwright artifacts on test failure to help debug what went wrong

.github/workflows/build.yml

@@ -40,6 +40,14 @@ jobs:
           name: commafeed.jar
           path: commafeed-server/target/commafeed.jar
 
+      - name: Upload Playwright artifacts
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: playwright-artifacts
+          path: |
+            **/target/playwright-artifacts/
+
       # Docker
       - name: Login to Container Registry
         uses: docker/login-action@v3

commafeed-server/src/test/java/com/commafeed/e2e/PlaywrightTestBase.java

@@ -34,7 +34,7 @@ import com.microsoft.playwright.Tracing;
  * 
  */
 @ExtendWith(PlaywrightTestBase.SaveArtifactsOnTestFailed.class)
-public class PlaywrightTestBase {
+public abstract class PlaywrightTestBase {
 
 	private static Playwright playwright;
 	private static Browser browser;