fixup!: wip get headless mode working

Author: PiTrem

.github/workflows/flutter.yml

@@ -23,6 +23,7 @@ jobs:
           flutter-version: '3.22.2'
       - run: flutter pub get
       - run: flutter config --enable-web
+      - run: apt-get -y install xvfb
       - name: test
         env:
           TEST_INSTANCE_URL: ${{ secrets.TEST_INSTANCE_URL }}