ci: redirect output of backend and testapp to log files for better debugging

.github/workflows/wc-e2e-test.yaml

@@ -37,7 +37,7 @@ jobs:
           ./prepare.sh
           cd backend
           npm install
-          npm run start:prod &
+          npm run start:prod > ../../backend.log 2>&1 &
       - name: Wait for OpenVidu Meet to Start
         run: wait-on --timeout 30000 http://localhost:6080/meet/health
       - name: Start testapp
@@ -46,11 +46,12 @@ jobs:
           cd testapp
           npm install
           npm run build
-          npm run start &
+          npm run start > ../testapp.log 2>&1 &
       - name: Wait for testapp to Start
         run: wait-on --timeout 30000 http://localhost:5080
       - name: Run tests
         run: |
+          ls -al backend/public
           cd frontend/webcomponent
           # Install Playwright browsers
           mkdir -p /tmp/ms-playwright
@@ -59,6 +60,15 @@ jobs:
         env:
           RUN_MODE: CI
           PLAYWRIGHT_BROWSERS_PATH: /tmp/ms-playwright
+      - name: Upload logs
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: service-logs
+          path: |
+            backend.log
+            testapp.log
+          retention-days: 7
       - name: Clean up
         if: always()
         uses: ./.github/actions/cleanup