updated Dockerfile and docker instructions.

docker/Dockerfile

@@ -81,15 +81,17 @@ RUN python setup.py build
 RUN python setup.py install 
 WORKDIR ..
 
+#hampy
+RUN pip install jupyter pandas
+
+ARG CACHE_DATE=2017-10-31
+
 #NIFTy
 RUN git clone https://gitlab.mpcdf.mpg.de/ift/NIFTy.git -b master
 WORKDIR NIFTy
 RUN python setup.py install
 WORKDIR ..
 
-#hampy
-RUN pip install jupyter pandas
-
 #Hammurabi
 RUN git clone https://bitbucket.org/ricphy/hamx -b maintenance
 WORKDIR hamx

docker/instructions

-sudo docker build -t iftmpa/imagine:dev .
+sudo docker build --build-arg CACHE_DATE=2017-10-31 -t iftmpa/imagine:dev .
 sudo docker login -u XXX -p XXX
 sudo docker push iftmpa/imagine:dev