diff --git a/docker/Dockerfile b/docker/Dockerfile
index 6b2852e..5daacee 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -40,9 +40,9 @@ RUN jupyter nbextension enable toc2/main
 #          from notebook.auth import passwd
 #          passwd()
 #       and take the hash from the output
-RUN mkdir -p ${HOME}/.jupyter && \
-	echo 'c.NotebookApp.password = u"sha1:c6bbcba2d04b:f969e403db876dcfbe26f47affe41909bd53392e"' \
-	>> ${HOME}/.jupyter/jupyter_notebook_config.py
+#RUN mkdir -p ${HOME}/.jupyter && \
+#	echo 'c.NotebookApp.password = u"sha1:c6bbcba2d04b:f969e403db876dcfbe26f47affe41909bd53392e"' \
+#	>> ${HOME}/.jupyter/jupyter_notebook_config.py
 
 ## INFO: Uncomment the RUN command below to disable git diff paging
 RUN git config --global core.pager ''
@@ -65,13 +65,11 @@ RUN git-nbdiffdriver config --enable --global
 ## INFO: Optionally uncomment any (one) of the following RUN commands below to ignore either
 #       metadata or details in nbdiff within git diff
 #RUN git config --global diff.jupyternotebook.command 'git-nbdiffdriver diff --ignore-metadata'
-RUN git config --global diff.jupyternotebook.command 'git-nbdiffdriver diff --ignore-details'
+#RUN git config --global diff.jupyternotebook.command 'git-nbdiffdriver diff --ignore-details'
 
 
-##
-RUN ls -l /tmp/
+# INFO: Dirty nbdime patching
 COPY docker/nbdime-*.patch /tmp/
-RUN ls -l /tmp/
 USER root
 WORKDIR /
 RUN patch -d /opt/conda/lib/python3.6/site-packages -p1 --forward --reject-file=- < \
@@ -86,3 +84,13 @@ WORKDIR ${workdir}
 COPY docker/bashrc /tmp/bashrc
 RUN cat /tmp/bashrc >> ${HOME}/.bashrc
 RUN sudo rm /tmp/bashrc
+
+
+# INFO: Git filter testing
+COPY docker/ipynb_cleaner.py /usr/bin/ipynb_cleaner
+RUN mkdir -p ~/.config/git \
+	&& echo '*.ipynb filter=clean_ipynb' >> ~/.config/git/attributes \
+	&& git config --global filter.clean_ipynb.clean ipynb_cleaner \
+	&& git config --global filter.clean_ipynb.smudge cat
+
+#	&& git config --global filter.clean_ipynb.clean 'ipynb_cleaner %f'
diff --git a/docker/ipynb_cleaner.py b/docker/ipynb_cleaner.py
new file mode 100755
index 0000000..d34d7a6
--- /dev/null
+++ b/docker/ipynb_cleaner.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+
+"""
+
+********************************
+DANGER - W.I.P. - TESTING ONLY!!
+********************************
+
+Clean jupyter notebook for git operations
+Based on "Keeping IPython notebooks under Git version control"
+(see:
+  https://gist.github.com/pbugnion/ea2797393033b54674af
+  http://pascalbugnion.net/blog/ipython-notebooks-and-git.html
+  http://stackoverflow.com/a/20844506/827862
+)
+"""
+
+import sys
+import json
+
+sys.stderr.write("\n\nCAUTION ! W.I.P ! Only dropping some test metadata, don't commit!\n\n")
+
+def log(x):
+  sys.stderr.write("\n\n[{}]\n\n\n".format(x))
+def logj(x):
+  sys.stderr.write("\n\n")
+  json.dump(x, sys.stderr, sort_keys=True, indent=1, separators=(",",": "))
+  sys.stderr.write("\n\n")
+
+log(sys.argv)
+#sys.exit(17)
+
+nb = sys.stdin.read()
+json_in = json.loads(nb)
+
+logj(json_in["metadata"])
+del json_in["metadata"]["nav_menu"]
+del json_in["metadata"]["toc"]
+json_in["metadata"]["language_info"]["version"]="17.0"
+logj(json_in["metadata"])
+
+json.dump(json_in, sys.stdout, sort_keys=True, indent=1, separators=(",",": "))