How to use the librato-node.configure function in librato-node

import { updateStrings as updateTimeAgoStrings } from './../lib/time_ago_in_words'

updateTimeAgoStrings({ about: '' })

// Fire up queue worker
const queue = kue.createQueue({ redis: process.env[process.env.REDIS_PROVIDER] })
const clusterWorkerSize = parseInt(process.env.CLUSTER_WORKERS, 10) || 1
const simultaneousWorkerRenders = parseInt(process.env.SIMULTANEOUS_RENDERS, 10) || 1
const renderProcessTimeout = parseInt(process.env.RENDER_PROCESS_TIMEOUT, 10) || 60
const renderJobTtl = (parseInt(process.env.RENDER_JOB_TTL, 10) || 30) * 1000

// Periodically clear stuck jobs
queue.watchStuckJobs()

// Report Kue stats to Librato
librato.configure({
  email: process.env.LIBRATO_EMAIL,
  token: process.env.LIBRATO_TOKEN,
  source: process.env.DYNO,
})
librato.start()
librato.on('error', (err) => {
  Honeybadger.notify(err)
  console.error(err)
})

const libratoReporter = setInterval(() => {
  queue.inactiveCount((err, total) => {
    if (!err) {
      librato.measure('kue.inactive.count', total)
    }
  })

// Honeybadger "before everything" middleware
app.use(Honeybadger.requestHandler);

// Log requests with Heroku's logfmt
app.use(logfmt.requestLogger({ immediate: false }, (req, res) => {
  const data = logfmt.requestLogger.commonFormatter(req, res)
  data.useragent = req.headers['user-agent']
  return data
}))

// Parse cookies (for determining to pre-render or not)
app.use(cookieParser())

// Send stats to Librato
librato.configure({
  email: process.env.LIBRATO_EMAIL,
  token: process.env.LIBRATO_TOKEN,
  source: process.env.DYNO,
})
librato.start()
app.use(librato.middleware())

librato.on('error', (err) => {
  console.log('[librato] ERROR', err)
})

// Use Helmet to lock things down
app.use(helmet())

const indexStr = fs.readFileSync(path.join(__dirname, './../../public/index.html'), 'utf-8')
const stats = JSON.parse(fs.readFileSync(path.join(__dirname, './../../webpack-stats/server.json'), 'utf-8'))