Try using buildx docker bake for more parallelism and caching of images

.github/workflows/ci.yaml

@@ -230,12 +230,10 @@ jobs:
 
       # Pull, build, and cache all dependencies in the docker-compose file for testing.
       # This should automatically use the github actions cache
-      - name: Build and push
+      - name: Bake docker compose dependencies
         uses: docker/bake-action@7a5dfed3550ca014665af2a27af8fc9d7284b9b3 # v4.5.0
         with:
-          files: ./docker/docker-compose.yml
-          # Build context:
-          source: ./docker 
+          workdir: ./docker
 
       - name: Run transcript tests
         # If it takes longer than this, it's probably stalled out.