just add readme and build badge

README.md

@@ -1,2 +1,5 @@
 # jekyll-docker
 
+[![Build Status](https://drone.bunix.de/api/badges/bunix42/docker-piwik/status.svg)](https://drone.bunix.de/bunix42/docker-piwik)
+
+this is just a simple container for auto building my personal blog