Make a good docs

[riolly]

Self describes.

The task to be done:

• More explanation about why add that stack
• More links to related resource
• Use markdown format correctly
• Add path aliases to the table of content
• Globals style on scss format
• Implement google OAuth to the template
• Note on using other that npm

[makyfj]

@riolly I like this repo and now I'm using for every new t3 project I create, I would like to add yarn as well because I personally use yarn more than npm. Check this pr PR#6

[riolly]

Thank you for your support @makyfj. I invite you as a collaborator if you are interested.
Check my PR review.