message: workflows: use our docker image for style check
diff: @@ -48,6 +48,7 @@ jobs:
  ubuntu18-check-style:
  name: ubuntu-18.04 (check style)
  runs-on: ubuntu-18.04
  + container: mavsdk/mavsdk-ubuntu-18.04
  steps:
  - uses: actions/checkout@v1
  with:
  