fix: add Bearer token authentication to ntfy notification

.github/workflows/docker-image.yml

@@ -34,9 +34,11 @@ jobs:
         if: github.event_name == 'push'
         env:
           NTFY_URL: ${{ secrets.NTFY_URL }}
+          NTFY_TOKEN: ${{ secrets.NTFY_TOKEN }}
         run: |
-          curl -v \
+          curl -s -o /dev/null \
             -H "Title: kiosk-guestbook image pushed to Docker Hub" \
             -H "Tags: white_check_mark" \
+            -H "Authorization: Bearer $NTFY_TOKEN" \
             -d "The kiosk-guestbook container has been pushed to Docker Hub and is ready to pull. Commit: ${{ github.sha }} — ${{ github.event.head_commit.message }}" \
             "$NTFY_URL"