How do you get the port number and detect when a connection has closed? about simple-web-server HOT 2 OPEN

#include "server_http.hpp"

using namespace std;
using HttpServer = SimpleWeb::Server<SimpleWeb::HTTP>;

int main() {
  HttpServer server;
  server.config.port = 8080;

  server.default_resource["GET"] = [](shared_ptr<HttpServer::Response> response, shared_ptr<HttpServer::Request> request) {
    response->write("Hello");
    response->send([](const SimpleWeb::error_code &ec) {
      // response has been sent or errored
    });
  };

  server.start();
}