Merge pull request #11 from xarisd/01-add-design-artifacts

Add static HTML from "Designer"
Set rbenv to isolate the development environment

* Ruby Version : 2.12
* Gems : localy (.gems folder)
* .gitignore : add .gems folder to ignored files
Create the rails app in the current directory
Merge branch '02-create-rails-app' of github.com:xarisd/thessrbio into 02-create-rails-app