Upgrade example for JupyterHub 0.7

Author: parente

Dockerfile.jupyterhub

@@ -1,10 +1,9 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-FROM jupyterhub/jupyterhub-onbuild:0.6.1
+FROM jupyterhub/jupyterhub-onbuild:0.7.0
 
 # Install dockerspawner and its dependencies
 RUN /opt/conda/bin/pip install \
-    jupyterhub==0.6.* \
     oauthenticator==0.4.* \
     dockerspawner==0.4.*