Update README.md

Author: dcasavant

README.md

@@ -3,6 +3,9 @@ Pega Docker Image
 
 This project produces a base Docker image that can be used to create a complete Docker image for running Pega applications using containers.  The Pega .war file is not included in this build.
 
+[![Build Status](https://travis-ci.org/pegasystems/docker-pega-web-ready.svg?branch=master)](https://travis-ci.org/pegasystems/docker-pega-web-ready)
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 # Using this image
 
 You cannot run the image directly because it does not come with the Pega web application (.war file).  Therefore you must use this image as a base to construct an executable Docker image.