message: ci: Use fcos buildroot
  I think we should try to have a common workflow across CoreOS
  projects, so use the new upstream buildroot.
diff: @@ -8,18 +8,12 @@ on:
  branches: [master]
  jobs:
  - container-dev:
  - name: "Dev container"
  + build-fcos:
  + name: "Build in FCOS buildroot"
  runs-on: ubuntu-latest
  + container: quay.io/coreos-assembler/fcos-buildroot:testing-devel
  steps:
  - name: Checkout repository
  uses: actions/checkout@v2
  - - name: Assemble dev-container
  - run: docker build -f contrib/Dockerfile.dev -t coreos/zincati:dev .
  - - name: Run dev-container
  - run: docker run --rm -v "$(pwd):/source" -v "/tmp/assembler:/assembler" coreos/zincati:dev
  - - name: Archive artifacts (overrides/rootfs)
  - uses: actions/upload-artifact@v2
  - with:
  - name: zincati-overrides-rootfs
  - path: /tmp/assembler/overrides/rootfs/
  + - name: Build and test
  + run: make
  