wip: nixify

.github/workflows/build.yml

@@ -31,7 +31,10 @@ jobs:
           pwd          
           ls -la 
           docker ps -a
-          docker run hello-world
+          docker rm $(docker ps -aq)
+          mkdir test
+          touch test/xxx
+          docker run -v "$(pwd)/test:/test:z" --rm --entrypoint=/bin/bash -ti ubuntu -c "ls -la /test"
 
 #  build-jvm:
 #    runs-on: ubuntu-latest