server.js

/* Setting things up. */
const express = require('express');
const app = express();
const CronJob = require('cron').CronJob;
const Twit = require('twit');
const config = {
    /* Be sure to update the .env file with your API keys. See how to get them: https://botwiki.org/tutorials/how-to-create-a-twitter-app */      
    twitter: {
        consumer_key: process.env.TWITTER_CONSUMER_KEY,
        consumer_secret: process.env.TWITTER_CONSUMER_SECRET,
        access_token: process.env.TWITTER_ACCESS_TOKEN,
        access_token_secret: process.env.TWITTER_ACCESS_TOKEN_SECRET
    }
};
const T = new Twit(config.twitter);

app.use(express.static('public'));

const listener = app.listen(process.env.PORT, () => {
  console.log('Your bot is running on port ' + listener.address().port);

  /*
    Set up a new cron job to start tweeting automatically.
    Check out https://www.npmjs.com/package/cron#available-cron-patterns to learn more about cron scheduling patterns.
    
    For a few examples, see https://glitch.com/edit/#!/creative-bots?path=helpers%2Fcron-schedules.js

  */

  (new CronJob('0 */2 * * *', () => {
    
    /* The example below tweets out "Hello world 👋" and the current date. */

    const date = new Date().toLocaleString();

    T.post('statuses/update', {
        status: 'Hello world 👋 ' + date
    }, (err, data, response) => {
      if (err){
        console.log('error!', err);
      }
      else {
        console.log('tweeted', `https://twitter.com/${ data.user.screen_name }/status/${ data.id_str }`);
      }
    });
  })).start();
});