KUE - sure fire way to shutdown after processing only one payload

worker.js

var kue = require('kue')

var queue = kue.createQueue({
  redis: process.env.REDIS_URL
});

var JOB_NAME = 'crawl';

queue.process(JOB_NAME, function(job, ctx, done){
  console.log((new Date()).toLocaleString(), 'inside queue.process("'+JOB_NAME+'") for job id:', job.id);
  doSomething(job.data, ctx, done);
});

// WARN: if we forget a variable in the signature and NODE crashes,
//       the container does not shutdown in 1 out of a 1000 times
function doSomething(payload, ctx, done) {
  console.log((new Date()).toLocaleString(), 'inside doSomething()');
  setTimeout(function() { // pretend to work and finish after few seconds
    console.log('successfully ran the job');
    console.log('payload', payload);
    done();
  }, 5000);
}

// Shut down after processing only one job
setTimeout( function () {
  console.log(  (new Date()).toLocaleString(), '[ Shutting down when all jobs finish... ]' );
  queue.shutdown( function ( err ) {
    console.log(  (new Date()).toLocaleString(), '[ All jobs finished. Kue is shut down. ]' );
    process.exit( 0 );
  } )
}, 1000 );