Rollback Dockerfile, change failed for some reason

Dockerfile

@@ -1 +1,20 @@
-FROM ageron/handson-ml-base
+FROM andrewosh/binder-base
+
+USER root
+RUN apt-get update
+RUN apt-get install -y python-numpy python-dev cmake zlib1g-dev libjpeg-dev xvfb libav-tools xorg-dev python-opengl libboost-all-dev libsdl2-dev swig
+
+USER main
+
+# Python 2
+RUN conda install -c jjhelmus tensorflow=0.10.0
+RUN conda install -c conda-forge jupyter_contrib_nbextensions
+RUN jupyter contrib nbextension install --user
+RUN jupyter nbextension enable toc2/main
+RUN pip install --upgrade gym
+RUN pip install --upgrade 'gym[atari]'
+
+# Python 3
+RUN conda install -n python3 -c jjhelmus tensorflow=0.10.0
+RUN /bin/bash -c "source activate python3 && pip install --upgrade gym"
+RUN /bin/bash -c "source activate python3 && pip install --upgrade 'gym[atari]'"