Fix dockerfile path

Author: tomaszprasolek

.github/workflows/dotnet.yml

@@ -34,6 +34,6 @@ jobs:
     - name: Build and push Docker image
       uses: docker/build-push-action@v4
       with:
-        context: .
+        context: /KubernetesTestApp/.
         push: true
         tags: ${{ secrets.DOCKERHUB_USERNAME }}/kubernetestestapp:latest