Update README.md

Janos Matyas · Janos Matyas · commit da98ba7aefd8 · 2014-07-13T22:41:13.000+02:00
diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@ Apache Spark on Docker
 ==========
 
 This repository contains a Docker file to build a Docker image with Apache Spark. This Docker image depends on our previous [Hadoop Docker](https://github.com/sequenceiq/hadoop-docker) image, available at the SequenceIQ [GitHub](https://github.com/sequenceiq) page.
-The base Hadoop docker image is also available as an official Docker image (sequenceiq/hadoop-docker).
+The base Hadoop Docker image is also available as an official [Docker image](https://registry.hub.docker.com/u/sequenceiq/hadoop-docker/) (sequenceiq/hadoop-docker).
 
 ## Building the image
 ```
