Like mkdir -p, but in node.js!
npm install --only=production --save mkdirp-promise
const mkdirp =
mkdirp(dir, [, options])
When it finishes, it will be fulfilled with the first directory made that had to be created, if any.
When it fails, it will be rejected with an error as its first argument.
option object will be directly passed to mkdirp.