Improving HSD installation instructions

Hello, I'm Oscar and I'm physical therapist. No code knowledge, no Ubuntu experience. My final aim is try to help you to improve the experience installing HSD in a Ubuntu 16.04, hosted in google Cloud. Until 1st May i will enjoy free trial Google Cloud. This is the time I have to be successfull in this awesome adventure (install HNS node). First of all I want to say thank you all of you for your work and all my words here go to be constructive criticism.
**First I have questions in my first steps:**

_1. Is necessary create a user o superuser to install requirements?
2. If answer is yes, how can i create user o superuser?
3. Have I logout and login to make effect the changes?_

**Suggestions**

_1. Link to basic command lines in Ubuntu.
2. Add command line to check version of requirements programs
3. Create a complete requirement list.
4. Direct link to Node.js and command line to check version.
5. If Node-GYP must be isntalled then add it in the requirement list and their requirement list too (with links)
6. If is it necessary a Docker Version add in the requirement list and link or command line to install.
7._

I offer myself to do the changes, add links, etc. But first I need yo know your opinion. Thnks

Start by locating the HSD installation documentation and reviewing its prerequisites for Ubuntu 16.04, Node.js, node-gyp, Docker, and Google Cloud. Document the required user permissions, version checks, complete requirements, and installation links so a new user can follow the setup without unanswered prerequisite questions.

Written by the indexing model from the issue text.