Send an email with Nodemailer

alert.js

const nodemailer = require('nodemailer');
const smtpTransport = require('nodemailer-smtp-transport');

const options = {
  service: 'gmail',
  host: 'smtp.gmail.com',
  port: 465,
  secure: true,
  auth: {
    user: process.env.FROM,
    pass: process.env.PASS,
  },
};

const mailOptions = {
  from: process.env.FROM,
  to: process.env.TO || process.env.FROM,
  subject: 'Updated COVID results',
  text: 'Updated results are available. Login to your portal to view them.'
}

const mailOK = process.env.FROM && process.env.PASS;
let transporter;

if (mailOK) {
  transporter = nodemailer.createTransport(smtpTransport(options));
}

module.exports = async () => {
  if (mailOK) {
    try {
      await transporter.sendMail(mailOptions);
      console.log('Email sent successfully\n');
    } catch (error) {
      console.log('Error sending email...\n', error, '\n');
    }
  }
}