Update README.md

Author: kevinmainairungu

README.md

@@ -23,6 +23,8 @@ Since students haven't yet learned about saving data or the Android lifecycle, i
 
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+[![Build Status](https://app.bitrise.io/app/53d2d85f08751a22/status.svg?token=FMnmaVWLN98ElrQJ3pAqgw)](https://app.bitrise.io/app/53d2d85f08751a22)
+
 ### Table of contents
 
 **1 [About the App](#about-the-app)**<br>