Node.js console application skeleton

skeleton.js

if (process.argv.length < 3) {
  console.log('Usage: node ' + process.argv[1] + ' FILENAME');
  process.exit(1);
}

var fs = require('fs')
  , filename = process.argv[2];

let input = fs.readFileSync(filename, 'utf8');

// write your program here

// output your solution
console.log(input);