Simplify Docker Buildx setup in workflow

Removed unnecessary buildkitd-flags and provenance options.

.github/workflows/dockerhub-mcp.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
         with:
-          buildkitd-flags: --root /tmp/buildkit --oci-worker-gc --oci-worker-gc-keepstorage=8GB
+          buildkitd-flags: --root /tmp/buildkit
 
       - name: Log in to Docker Hub
         uses: docker/login-action@v3
@@ -59,8 +59,7 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=registry,ref=cognee/cognee-mcp:buildcache
           cache-to: type=registry,ref=cognee/cognee-mcp:buildcache,mode=max
-          provenance: false
-          sbom: false
+
 
       - name: Image digest
         run: echo ${{ steps.build.outputs.digest }}