Fix cryptography warning

Dockerfile

@@ -9,6 +9,7 @@ RUN apt-get install -y nodejs python-gdal p7zip-full && npm install -g nodemon &
     ln -s /code/SuperBuild/install/bin/entwine /usr/bin/entwine && \
     ln -s /code/SuperBuild/install/bin/pdal /usr/bin/pdal
 
+
 RUN mkdir /var/www
 
 WORKDIR "/var/www"
@@ -16,4 +17,7 @@ COPY . /var/www
 
 RUN npm install && mkdir tmp
 
+# Temporary fix to cryptography warning
+RUN pip install cryptography==2.9.2
+
 ENTRYPOINT ["/usr/bin/nodejs", "/var/www/index.js"]