node-proxy-middleware with browser

gulpfile.js

gulp.task('server', function() {
  browserSync({
    server: {
      baseDir: 'source'
    },
    logConnections: true,
    open: false
  });
});

nodestuff.js

var proxyOptions = require('url').parse('http://localhost:3000');

if (config.proxy) {
  winston.warn('config.proxy is set, passing to localhost:3000');
  var proxy = require('proxy-middleware');

  userLoggedIn = function(req, res, next) {
    if (req.isAuthenticated()) {
      res.cookie('debug', config['development-mode']);
      return proxy(proxyOptions)(req, res, next);
    } else {
      res.send('<button onclick="location.href=\'/auth'">Login</button>');
    }
  };
}