docs: Update docker image

Author: Martin Schneppenheim

README.md

@@ -25,10 +25,10 @@ You can find a list of all exported metrics here: [/docs/metrics.md](/docs/metri
 ### 🐳 Docker image
 
 All images will be built on each push to master or for every new release. You can find an overview of all available tags
-in our [quay.io repository](https://quay.io/repository/cloudhut/kminion?tab=tags).
+in our [DockerHub repository](https://hub.docker.com/r/vectorized/kminion/tags).
 
 ```shell
-docker pull quay.io/cloudhut/kminion:master
+docker pull docker pull vectorized/kminion:v2.2.1
 ```
 
 ### ☸ Helm chart