Update README.md

Author: jeromewu

README.md

@@ -6,9 +6,11 @@
 
 Gitpod Window offers you an immersive IDE experience with minimal UI and shortcuts.
 
->> This is NOT an official extension from Gitpod
+\* This is NOT an official extension from Gitpod
 
 The goal of this extension is to provide a improved Gitpod online IDE experience. What is does is opening a Chrome popup window with:
 
 - Minimal Chrome Interface (see screenshot)
 - Full Keyboard Shortcuts (incl. Ctrl-W, Ctrl-N, Ctrl-T and more)
+
+If you would like to learn how to write a Chrome Extension like this, check: [I wrote a Chrome Extension (Gitpod Window). Here is what I learned.]()