added PHP preamble

setup.sh

@@ -428,6 +428,12 @@ done
 
 ### PHP-FPM related options
 # get PHP-FPM usage status
+echo -e "\n${mag}PHP-FPM allows your server to process and serve dynamic PHP content. If you"
+echo "have PHP-FPM installed then NGINX needs to know how to access it. The following"
+echo "questions will allow the script to auto-configure that for you.  If you have"
+echo "not yet installed PHP-FPM but intend to in the future, you can answer yes and"
+echo "provide details for your intended setup so the script can still generate the"
+echo -e "configuration for you.${norm}\n"
 while true; do
     read -p "Are you using PHP-FPM? (default: YES) " yn
     case $yn in