Okay, my second and last attempt to add the book :) The book is perceived as an open source book to learn React. People like and share it in the community. I would love to see it in the list of React resources.
Even though people can pay what they want to support events like this: https://www.robinwieruch.de/giving-back-by-learning-react/
updated regex cheat sheet as the other one was just for .NET. Also updated the `Watch this if you want to become a web developer` link to the updated one
* Add resouce to a hands on tutorial to make first pull request
Add link to [first contributions](https://github.com/Roshanjossey/first-contributions)
which is a hands-on tutorial to get beginners to get started with contributing
to open source
* Changed Open Source Contribution Order
Moved the official Github guide to the top of the list
Added MERN Tutorials to the Full Stack section.
More Node Links
*Should've finished before I posted this, didn't realize it would be this popular. Will get the rest of my links up tomorrow.
