Add a "Reviewed by Hound" badge

README.md

@@ -4,6 +4,7 @@
 [![GoDoc](https://godoc.org/github.com/v2tec/watchtower?status.svg)](https://godoc.org/github.com/v2tec/watchtower)
 [![](https://images.microbadger.com/badges/image/v2tec/watchtower.svg)](https://microbadger.com/images/v2tec/watchtower "Get your own image badge on microbadger.com")
 [![Go Report Card](https://goreportcard.com/badge/github.com/v2tec/watchtower)](https://goreportcard.com/report/github.com/v2tec/watchtower)
+[![Reviewed by Hound](https://img.shields.io/badge/Reviewed_by-Hound-8E64B0.svg)](https://houndci.com)
 
 A process for watching your Docker containers and automatically restarting them whenever their base image is refreshed.