Update script to use shared fragments from the include dir

script/setup

@@ -3,24 +3,10 @@
 # script/setup: Set up application for the first time after cloning, or set it
 #               back to the initial first unused state.
 
-# If a command fails, exit the script
-set -e
+source "$(dirname "${0}")"/../script/include/global_header.inc.sh
 
-# Ensure we are in the app root directory (not the /script directory)
-cd "$(dirname "${0}")/.."
+# Turn on sass compiler installation
+INSTALL_SASS="true"
 
-# Install virtualenv
-pip install pipenv
-pipenv --python 3.6
-
-if ! type sass > /dev/null; then
-  if type gem > /dev/null; then
-    echo 'installing a sass compiler...'
-    gem install sass
-  else
-    echo 'Could not install a sass compiler. Please install a version of sass.'
-  fi
-fi
-
-# Install application dependencies
-script/bootstrap
+# Run the shared setup script
+source ./script/include/run_setup