Read in data piped ala `cat config.json | node app.js`

pipedDataStream.js

var tty = require('tty');
exports.pipedDataStream = pipedDataStream;

//
// If there was piped input, it returns a ReadableStream of the content
// use "data" and "end" events as per the norm.
//
// Else returns falsey.
//

function pipedDataStream() {
  if(!tty.isatty(0)) {
    process.openStdin();
    return process.stdin;
  }
}