Update README with inactive status

Author: davidxia

README.md

@@ -1,10 +1,16 @@
 # Dockerfile Maven
 
-[![Build Status](https://travis-ci.org/spotify/dockerfile-maven.svg?branch=master)](https://travis-ci.org/spotify/dockerfile-maven)
+[![Build Status](https://travis-ci.com/spotify/dockerfile-maven.svg?branch=master)](https://travis-ci.com/spotify/dockerfile-maven)
 [![Maven Central](https://img.shields.io/maven-central/v/com.spotify/dockerfile-maven.svg)](https://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.spotify%22%20dockerfile-maven)
 [![License](https://img.shields.io/github/license/spotify/dockerfile-maven.svg)](LICENSE)
 
-This is a Maven plugin helps Maven integrate with Docker.
+## Status: inactive
+
+**Spotify no longer uses this project internally. If you'd like to take over as
+the maintainer for this project, please let us know by creating an issue and
+@mentioning us.**
+
+This Maven plugin integrates Maven with Docker.
 
 The design goals are: