This manifest deploys the *ingress-nginx* controller, which is
responsible for handing traffic from clients outside the cluster and
routing it to the proper pods. I am using host network mode here to
avoid having to have another proxy in front of the ingress controller,
which would be required in NodePort mode.
I looked at MetalLB briefly, but decided to avoid it for now. As with
everything else in the Kubernetes world, it seems massively complex.