Update run script

RStudio/run_rstudio_singularity.sh

@@ -64,6 +64,8 @@ for lib in $VIZAPP_LIBS; do
     R -e "if (!require('$lib', character.only=TRUE)) {install.packages('$lib', dependencies=TRUE, lib='$R_LIBS_USER')}"
 done
 
+echo -e "\nPlease visit http://localhost:8787 to connect to the RStudio server ...\n"
+
 # run vizapp on localhost
 SINGULARITYENV_R_LIBS_USER=${R_LIBS_USER} \
 SINGULARITYENV_DISABLE_AUTH=$DISABLE_AUTH \