message: yarn start doc: mention web root
diff: @@ -68,6 +68,8 @@ property to `package.json` with the url of kiali.
  ...
  ----
  +If Kiali is configured with a specific web root, make sure to append it to the URL. On many setups with Kubernetes, the web root will be `/kiali` by default.
  +
  Run `yarn start` and try it!
  [source, bash]
  ----
  