update README.md

Author: kentcdodds

README.md

@@ -1,4 +1,19 @@
-# react-testing-library-course
+<h1 align="center">
+ Test React Components with Jest and React Testing Library
+</h1>
+
+<div align="center">
+ <h2><a href="https://testingjavascript.com">TestingJavaScript.com</a></h2>
+ <a href="https://testingjavascript.com">
+ <img
+  width="500"
+  alt="Learn the smart, efficient way to test any JavaScript application."
+  src="https://kentcdodds.com/images/testingjavascript-promo/tjs-4.jpg"
+ />
+ </a>
+</div>
+
+<hr />
 
 _Course material for testing React components using react-testing-library_