It’s setting up only Node.js on Ubuntu 16.04. This article includes PM2, Nginx and Let’s Encrypt setup which is not included with Node.js One-Click Application.
Don’t worry, by following above tutorial, you can do it your self very easily. :)

Bascially by looking on tutorial, One-Click App only does Install Node.js

Got an error on the nginx step, maybe you can help: https://www.digitalocean.com/community/questions/do-i-need-nginx-is-this-error-i-got-a-problem