Add docker badges

README.md

@@ -2,6 +2,9 @@
 
 [![Build Status](https://travis-ci.org/emgag/varnish-towncrier.svg?branch=master)](https://travis-ci.org/emgag/varnish-towncrier)
 [![Go Report Card](https://goreportcard.com/badge/github.com/emgag/varnish-towncrier)](https://goreportcard.com/report/github.com/emgag/varnish-towncrier)
+[![Docker Pulls](https://img.shields.io/docker/pulls/emgag/varnish-towncrier.svg)](https://hub.docker.com/r/emgag/varnish-towncrier)
+[![Image Layers](https://images.microbadger.com/badges/image/emgag/varnish-towncrier.svg)](https://microbadger.com/images/emgag/varnish-towncrier "Get your own image badge on microbadger.com")
+[![Latest Version](https://images.microbadger.com/badges/version/emgag/varnish-towncrier.svg)](https://microbadger.com/images/emgag/varnish-towncrier "Get your own version badge on microbadger.com")
 
 **WORK IN PROGRESS**: more or less feature complete, but not used in production yet.