feat(cluster): implement echo-server helm release

Signed-off-by: Devin Buhl <devin@buhl.casa>

README.md

@@ -21,6 +21,7 @@ Feel free to read up on any of these technologies before you get started to be m
 
 - [cert-manager](https://cert-manager.io/) - SSL certificates - with Cloudflare DNS challenge
 - [calico](https://www.tigera.io/project-calico/) - CNI (container network interface)
+- [echo-server](https://github.com/Ealenn/Echo-Server) - REST Server Tests (Echo-Server) API (useful for debugging HTTP issues)
 - [flux](https://toolkit.fluxcd.io/) - GitOps tool for deploying manifests from the `cluster` directory
 - [hajimari](https://github.com/toboshii/hajimari) - start page with ingress discovery
 - [kube-vip](https://kube-vip.io/) - layer 2 load balancer for the Kubernetes control plane