Created by: GAumala
Added new section with 5 environment variables that can be used with npm start:
- BROWSER
- HTTPS
- HOST
- NODE_PATH
- PORT
I placed this section right before troubleshooting because I'm not sure were it should go. This documents all the environment variables that I am aware of as well as the new BROWSER variable. I don't have any experience writing user guides so, any criticism is welcome, I'll try to make any changes you request.