Build context fixed

Author: miguelvaara

.github/workflows/ci.yml

@@ -129,7 +129,7 @@ jobs:
       - name: Build and push to Quay.io
         uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83  # v6.18.0
         with:
-          context: .
+          context: ./dockerfiles/jena-fuseki2-docker
           file: ./dockerfiles/jena-fuseki2-docker/Dockerfile # later: ./dockerfiles/Dockerfile.ubuntu
           push: true
           tags: ${{ steps.meta.outputs.tags }}