(TMP) github actions: try image build with docker

Signed-off-by: Michael Adam <[email protected]>

.github/workflows/main.yml

@@ -43,6 +43,20 @@ jobs:
         # using podman explicity for the push job
         run: make CONTAINER_CMD=podman image-build || df -h
 
+  dockerbuild:
+    runs-on: ubuntu-latest
+    # don't run on push, since the "push" job contains the
+    # image build step, so no need to do it twice.
+    if: github.event_name == 'pull_request'
+    steps:
+      - uses: actions/checkout@v2
+      - name: check free space
+        run: df -h
+      - name: build container image
+        # note: forcing use of podman here since we are
+        # using podman explicity for the push job
+        run: make CONTAINER_CMD=docker image-build || df -h
+
   # push the container to quay.io - only for pushes, not PRs
   push:
     needs: [build, check]