server.js

/*eslint-env node */
var Koa = require('koa');
var fetch = require('node-fetch');
var app = new Koa();

app.use(function *() {
  var that = this;
  fetch('https://api.github.com/users/github')
    .then(function(res) {
      return res.json();
    }).then(function(json) {
      console.log(json);
      that.status = 200;
      that.body = json;
    }).catch(function(err) {
      console.log(err);
    });
});

app.listen(8000, function (err) {
  if (err) {
    console.error(err);  // eslint-disable-line no-console
    process.exit(1);
  }

  process.stdout.write(`Listening at http://0.0.0.0:8000\n`);
});