Create a Gatsby guide

[ferdi05]

Some inspiration from Algolia's guide

[shivaylamba]

I have created a draft pull request on the Gatsby Github Repository ( gatsbyjs/gatsby#34886 ).

Currently waiting for review from the Gatsby team.

[shivaylamba]

PR on Gatsby repo closed as the Gatsby team requested to post this on our own blog site.

Currently in review by Tommy for posting on our blog site. ETA: 1st week of March

[ferdi05]

It's published, congrats @shivaylamba!
Feel free to close the issue and mark it as done when applicable.