Update index.md

Author: ericelliott

getting-started/index.md

@@ -9,7 +9,7 @@ Node will be used for both server-side and client-side programming in JavaScript
 
 If you need help learning Git and the Terminal, check out these free resources:
 
-* [Try Git](https://try.github.io/levels/1/challenges/1)
+* [Try Git](https://try.github.io/levels/1/challenges/1) & [Git: The Simple Guide](http://rogerdudler.github.io/git-guide/)
 * [An Introduction to the Linux Terminal](https://www.digitalocean.com/community/tutorials/an-introduction-to-the-linux-terminal)
 
 ## Installing Node