Add a build status icon

jakzal · jakzal · commit 3bd7743f6cfe · 2017-07-13T23:09:55.000+02:00
diff --git a/README.md b/README.md
@@ -2,6 +2,8 @@
 
 Docker image with quality analysis tools for PHP.
 
+[![Build Status](https://travis-ci.org/jakzal/docker-phpqa.svg?branch=master)](https://travis-ci.org/jakzal/docker-phpqa)
+
 ## Available tools
 
 * composer - [Dependency Manager for PHP](https://getcomposer.org/)
