apple-app-site-association middleware for express

appLinks.js

const path = require('path')

module.exports = function (root) {
  return function (req, res) {
    const aasa = path.join(root, 'apple-app-site-association')

    res.set('Content-Type', 'application/pkcs7-mime')
    res.status(200)
    res.sendFile(aasa)
  }
}

i think it is better if you replaced root with __dirname
const aasa = path.join(__dirname, 'apple-app-site-association')