add hackerrank interview prep

Author: connor11528

README.md

@@ -64,6 +64,8 @@ Thanks for stopping by
 
 ## Learning Guides
 
+- **HackerRank Interview Prep Kit** - https://www.hackerrank.com/interview/interview-preparation-kit - Curated list of exercises from the HackerRank team organized around key concepts you'll need to know.
+
 - **Rithm School Computer Science Fundamentals with JavaScript** - https://www.rithmschool.com/courses/javascript-computer-science-fundamentals - I've been following along with some of this as I don't have a comp sci degree. They explain the concepts and then point you to additional resources for learning the material (like youtub videos and specific codewars problems) Very helpful.
 
 - **Coderbyte** - https://coderbyte.com/challenges/?a=true - Lots of programming challenges, access 10 for free otherwise $30 per month