var express = require('express');
var proxyMiddleware = require('http-proxy-middleware');
var port = 4000;

var app = express();
var options = {
  target: 'http://jsonplaceholder.typicode.com',
  logLevel: 'debug'
}

var apiProxy = proxyMiddleware('/myportfolio', options);
app.use(apiProxy);

app.listen(port, 'localhost', (err) => {
  if (err) {
    console.log(err);
    process.exit(1);
  }

  // So we can see a message whilst it bundles
  console.log(`now running on port: ${port}n`);
});

http://localhost:4000/myportfolio

// 20161023082019
// http://localhost:4000/myportfolio
{
}

http://127.0.0.1:4000/myportfolio

// 20161023082943
// http://127.0.0.1:4000/myportfolio
{
}

http://192.168.1.126:4000/myportfolio

GET http://192.168.1.126:4000/myportfolio net::ERR_CONNECTION_REFUSED

This site can’t be reached
192.168.1.126 refused to connect.

$ ifconfig | grep inet
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet6 fe80::4c:3ebe:e51d:819f%en0 prefixlen 64 secured scopeid 0x4
inet 192.168.1.126 netmask 0xffffff00 broadcast 192.168.1.255
inet6 fe80::18a8:e9ff:fe89:25e7%awdl0 prefixlen 64 scopeid 0x8
inet6 fe80::694c:e86:8b39:47f7%utun0 prefixlen 64 scopeid 0xa
inet6 fe80::45eb:e4b2:c242:48b%utun2 prefixlen 64 scopeid 0xc
inet6 fe80::859:d69c:1aec:7a59%utun1 prefixlen 64 scopeid 0xb
inet6 fe80::8d7:fd2c:e131:6832%utun3 prefixlen 64 scopeid 0xd
$