update README with imprint and news

src/README.md

@@ -35,6 +35,8 @@ The JupyterHub cluster runs on a [highly-available Kubernetes cluster](http://ku
 
 ## News
 
+### 2020-04-21: Go-live of JupyterHub pilot phase
+
 ### 2020-02-28: Kick-off meeting of the RWTH Jupyter Working group
 
 ### 2020-01-24: The first nodes of the cluster have been provisioning at ITC Wendlinge
@@ -51,3 +53,7 @@ The JupyterHub cluster runs on a [highly-available Kubernetes cluster](http://ku
 
 <img alt="EON Energy Research Center" src="./images/eonerc.png" width=400 />
 <img alt="IT Center" src="./images/itc.png" width=400 />
+
+## Imprint
+
+Please refer to the [imprint of RWTH Aachen](https://www.rwth-aachen.de/cms/root/Footer/Services/~bw/Impressum/).