Added XPRA

Dockerfile

@@ -24,8 +24,8 @@ RUN pip3 install --upgrade pip
 
 # Install 'nice to have lab extensions'
 RUN pip install --upgrade jupyterlab
-RUN pip install jupyterlab-git==0.34.0
-RUN pip install jupyterlab-gitlab==3.0.0
+#RUN pip install jupyterlab-git==0.34.0
+#RUN pip install jupyterlab-gitlab==3.0.0
 
 # Install for -> ewirtsch
 RUN pip install pandaSDMX==1.6.0