gistfile1.js

var http = require('http');
var WebSocket = require('ws');
var bouncy = require('bouncy');

var wsServer = new WebSocket.Server({ noServer: true });
var httpServer = http.createServer();

httpServer.on('upgrade', function (req, socket, head) {
  wsServer.handleUpgrade(req, socket, head, function(ws){
    ws.on('message', function(message) {
      console.log(message);
    });
    ws.send('hi from server');
  });
});

httpServer.listen(8001, function() {
  var proxy = bouncy(function(req, res, bounce) {
    bounce(8001);
  });
  proxy.listen(8000, function() {
    var ws = new WebSocket('ws://localhost:8000');
    ws.on('open', function() {
      ws.on('message', function(message) {
        console.log(message);
      });
      ws.send('hi from client');
    });
  });
});

package.json

{
  "private": true,
  "scripts": {
    "test": "node index.js"
  },
  "dependencies": {
    "bouncy": "^3.2.2",
    "ws": "^0.7.1"
  }
}