[Wiki.js](https://wiki.js.org/) is a free and open source, modern wiki app built on [Node.js](https://nodejs.org/en/), [Git](https://git-scm.com/) and [Markdown](https://daringfireball.net/projects/markdown/). Wiki.js source code is publicly hosted on [Github](https://github.com/Requarks/wiki). This guide will show you how to install Wiki.js on a fresh Ubuntu 18.04 LTS Vultr instance using Node.js, MongoDB, PM2, Nginx, Git and Acme.sh. Requirements to run Wiki.js and finish this guide are as ......