Added notes to  regarding external access
Added notes to  regarding external access

caicloud/ingress,aledbf/ingress-nginx,canhnt/ingress,caicloud/ingress,aledbf/ingress-nginx,kubernetes/ingress-nginx,canhnt/ingress,aledbf/ingress-nginx,canhnt/ingress,canhnt/ingress,kubernetes/ingress-nginx,kubernetes/ingress-nginx,caicloud/ingress,caicloud/ingress,aledbf/ingress-nginx,kubernetes/ingress-nginx,kubernetes/ingress-nginx