flux deployment: {
  shape: sequence_diagram

  laptop:   My Laptop
  gitlab:   Git Repo
  k8s:      Kubernetes
  flux:     Flux Kustomize Controller
  fluxhelm: Flux Helm Controller

  laptop -> gitlab: git push
  gitlab <- flux: git pull
  k8s    <- flux: apply HelmRelease

  k8s."HelmRelease"
  fluxhelm -> k8s: poll for HelmRelease resources
  fluxhelm -> k8s: `helm upgrade`
  k8s."NGINX Deployment, etc..."
}