title: Koajs: How to handle static file with /.../... path
body: <p>if the path is /index or /something, the static files can serve "/main.css" which it works normally, but if the path is /pictures/uuid, the static files will serve "/pictures/main.css" which there is not that folder. </p>
  
  <p>My CSS live in public/main.css</p>
  
  <pre><code>app.use(serve(path.join(__dirname + "/../public")));
  </code></pre>