Issue 757 : Maintain state in RStudio (#767)

* add rstudio setting to persist session state.

Author: vkumra-broad

docker/rstudio/Dockerfile

@@ -26,4 +26,10 @@ ENV RSTUDIO_HOME /etc/rstudio
 
 ADD rserver.conf $RSTUDIO_HOME/rserver.conf
 
+ENV RSTUDIO_USERSETTING /home/rstudio/.rstudio/monitored/user-settings/user-settings
+
+RUN sed -i 's/alwaysSaveHistory="0"/alwaysSaveHistory="1"/g'  $RSTUDIO_USERSETTING \
+&& sed -i 's/loadRData="0"/loadRData="1"/g' $RSTUDIO_USERSETTING \
+&& sed -i 's/saveAction="0"/saveAction="1"/g' $RSTUDIO_USERSETTING
+
 EXPOSE $RSTUDIO_PORT