Please enrich your demo tutorials and README.

[vovasoft]

What happened?

Today, I tried simulating the demo on multiple machines and encountered various issues. I suggest you carefully follow the procedures in the README, especially this one: https://github.com/kumahq/kuma-counter-demo/blob/master/README.md. It feels like the project hasn't been maintained for a while. A single-machine demo is crucial for understanding Kuma and service mesh. When I tested with Consul, it took me no more than 10 minutes, but with Kuma, I couldn't complete a single demo in three days. Setting up a Kubernetes environment is not convenient. In general, I suggest you try following your own README procedures and run the demo yourselves.