Update index.rst

add twitter

source/index.rst

@@ -26,7 +26,7 @@ My name is Robert Picard. I'm a security engineer at `Addepar <https://www.addep
 enthusiast. I like Flask for its simplicity in the face of frameworks like Django that
 try and be everything to everyone. That model works for a lot of people, but not for me.
 
-If you want to get in touch, feel free to send me an email at robert@robert.io. If you have
+If you want to get in touch, feel free to send me an email at robert@robert.io or connect on twitter `@__rlp <https://twitter.com/__rlp>`_. If you have
 feedback on the book, check out the `GitHub repository <https://github.com/rpicard/explore-flask>`_ too.
 
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