Async/Await with Nodejs File System. Reference: https://dev.to/starpebble/async-await-with-nodejs-file-system-1aa2

readFile.js

async function f() {
  const fsPromises = require('fs').promises;
  const data = await fsPromises.readFile('/tmp/data.json')
                     .catch((err) => console.error('Error: ', err));

  return JSON.parse(data.toString());
}