Error still persists, so trying another approach

This should explicitly instruct buildx to export the finished build as a
standard image in the local Docker daemon.

Author: mhucka

docker-compose.yml

@@ -6,6 +6,8 @@ services:
         build:
             context: ./
             dockerfile: Dockerfile
+        outputs:
+        - type=docker
     qsim-cxx-tests:
         platform: linux/amd64
         image: qsim-cxx-tests