library API that we are going to deploy on Kubernetes
Demonstrates exposing applications with ingress
service NodePort LoadBalancer
/apis/v1/books v1-books
/apis/v2/books v2-books
install nginx controller <br>
https://kubernetes.github.io/ingress-nginx/deploy/
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.0.3/deploy/static/provider/do/deploy.yaml