Deploy demo webapp

Demo webapp manifests:

Deploy the demo in webapp namespace:

kubectl apply -f ./webapp/common
kubectl apply -f ./webapp/backend
kubectl apply -f ./webapp/frontend

Deploy the demo in the dev namespace:

kustomize build ./overlays/dev | kubectl apply -f-

Deploy the demo in the staging namespace:

kustomize build ./overlays/staging | kubectl apply -f-

Deploy the demo in the production namespace:

kustomize build ./overlays/production | kubectl apply -f-