Update Dockerfile

Dockerfile

@@ -31,6 +31,8 @@ RUN apt-get update && \
 #    vim
 USER ${NB_USER}
 
+RUN echo "options(defaultPackages=c(getOption('defaultPackages'),'renkur'))" >> /usr/local/lib/R/etc/Rprofile.site
+
 # install the R dependencies
 COPY install.R /tmp/
 RUN R -f /tmp/install.R