pin notebook version <7 #371

Author: a-r-j

Dockerfile

@@ -28,6 +28,7 @@ RUN echo "$(cat requirements/base.in)" >> requirements.txt \
     && echo "$(cat requirements/dev.in)" >> requirements.txt \
     && echo "$(cat requirements/extras.in)" >> requirements.txt
 
+RUN pip install notebook==6.*
 RUN pip install -r requirements.txt --no-cache-dir
 
 RUN conda install -c conda-forge libgcc-ng