Apply the script:
kubectl apply -f https://gist.githubusercontent.com/pbochynski/059a9c2308c764d1991b45855083343c/raw/nginx-with-config-map.yaml
Start kubernetes proxy:
kubectl proxy
Open the web application: http://127.0.0.1:8001/api/v1/namespaces/default/services/nginx-service/proxy/