mqp

const app = require('express')();
const fs = require('fs');

// Resolves with a list of the filenames in dir, or rejects if dir doesn't exist or if something else goes wrong.
function readFileNames(dir) {
  return new Promise((resolve, reject) => {
    fs.readdir(dir, (err, files) => {
      if (err) {
        reject(err);
      } else {

mqp

const app = require('express')();
const fs = require('fs');

// Resolves with a list of the filenames in dir, or rejects if dir doesn't exist or if something else goes wrong.
function readFileNames(dir) {
  return new Promise((resolve, reject) => {
    fs.readdir(dir, (err, files) => {
      if (err) {
        reject(err);
      } else {