Make so converting to no SSR is more obvious

[chrismurrph]

Can I do a PR that changes the source code comment for wrap-server-side-rendering from "...remove this component.." to "..replace this component with wrap-valid-routes.."?
Where:

(defn wrap-valid-routes [handler]
  (fn [req]
    (let [uri (:uri req)
          bidi-match (bidi/match-route routing/app-routes uri)
          valid-page? (boolean bidi-match)]
      (if valid-page?
        (handler (assoc req :uri "/index.html"))
        (handler req)))))

This extra step you mentioned on slack was not obvious to me, and I assume there will be lots of people who want this URI routing but don't need SSR. I could put an index.html in resource/public as well, although my thinking is not to, just to make it obvious that it is not needed for what is primarily a SSR demo.