Github Workflow: minor fix

Author: GGoetzelmann

.github/workflows/docker_publish.yml

@@ -39,7 +39,8 @@ jobs:
       - name: Build and push Docker image
         uses: docker/build-push-action@v5
         with:
-          context: ./docker
+          context: .
+          file: docker/Dockerfile
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}