Add Dockerfile for v0.9

Dockerfile

@@ -10,7 +10,7 @@ RUN pip install --upgrade pip
 
 # install dependencies - including the stable version of Gammapy
 COPY binder.py tmp/
-RUN curl -o tmp/environment.yml https://gammapy.org/download/install/gammapy-0.8-environment.yml
+RUN curl -o tmp/environment.yml https://gammapy.org/download/install/gammapy-0.9-environment.yml
 
 WORKDIR tmp/
 RUN conda update conda
@@ -28,18 +28,18 @@ RUN adduser --disabled-password \
     ${NB_USER}
 
 # download tutorials and datasets
-RUN gammapy download notebooks --out=${HOME}/gammapy-tutorials --release=0.8
+RUN gammapy download notebooks --out=${HOME}/gammapy-tutorials --release=0.9
 RUN git clone https://github.com/gammapy/gammapy-extra.git ${HOME}/gammapy-extra
 WORKDIR ${HOME}/gammapy-extra
-RUN git checkout dfc299568b630af7d327a466123364819573cd9e
+RUN git checkout cd6bc642d801b3d85f8a0c863caa56be8bf44774
 
 # setting ownerships
 USER root
 RUN chown -R gammapy:gammapy ${HOME}
 
 # start JupyterLab server in tutorials dir
 USER ${NB_USER}
-WORKDIR ${HOME}/gammapy-tutorials/notebooks-0.8
+WORKDIR ${HOME}/gammapy-tutorials/notebooks-0.9
 
 # env vars used in tutorials
 ENV GAMMAPY_DATA ${HOME}/gammapy-extra/datasets