Run ./build-and-push.sh from metrics-* to push images.
kubectl apply -f custom-prom.yaml to deploy prometheus.
kubectl apply -f k8sconfig.yaml to deploy app containers.
GET /start on metrics-handle to trigger the call to metrics-processor.
To access from outside the cluster, either make the metrics-handle service a NodePort service or install Istio and set up config correctly with IngressGateway.