Dream.get(
  "home",
   _ => {
    let html = ReactDOM.renderToString(<App/>);

    Str.global_replace(
      Str.regexp("<div id=\"root\"></div>"),
      "<div id=\"root\">" ++ html ++ "</div>",
      indexFileString,
    )
    |> appendUniversalStyles)
    |> Dream.html;
  }
)