code: function onRequest(request, response) {
    if (request.url == "/favicon.ico") {
      var data = getFavIcon()
      if (!data) {
        response.writeHead(404, {"Content-Type": "text/plan"})
        response.end(request.url + " not found")
        return
      }
  
      response.writeHead(200, {"Content-Type": "image/png"})
      response.end(data)
      return
    }
  
    response.writeHead(200, {"Content-Type": "text/html"})
    response.end(getOpts.getHelpHTML())
  }
docs: ------------------------------------------------------------------------------