Gabigode

images.js

const images = [
  {
    file: '00.txt',
    source: '00'
  },
  {
    file: '01.txt',
    source: '01'
  },
  {
    file: '02.txt',
    source: '02'
  }
]

module.exports = images

server.js

const fs = require('fs')
const path = require('path')
const images = require('./images')

const main = (fileList) => {
  const randomFromArray = (fileList) => {
    return fileList[Math.floor(Math.random() * fileList.length)]
  }
  const loadFile = (selected) => {
    const filePath = path.join(__dirname, 'files', selected.file)
    return fs.readFileSync(filePath, { encoding: 'base64' })
  }
  const uploadFile = (selected) => {
    //logica para fazer o upload
  }
  const selected = randomFromArray(images)
  const file = loadFile(selected)
  const upload = uploadFile(file)
}
main(images)