add comments

debian/grantpriv.sh

@@ -3,6 +3,8 @@
 user=gitlab
 dbname=gitlab_production
 
+# If gitlab user cannot access gitlab_production,
+# then it means the gitlab role does not exist
 if ! su gitlab -s /bin/sh -c 'psql gitlab_production -c ""'
 then
 	echo "Create $user user with create database privillege..."
@@ -11,6 +13,7 @@ then
 	  }
 fi
 
+# By default the gitlab_prodcution is not owned by gitlab user
 echo "Make $user user owner of $dbname database..."
 sudo -u postgres psql -c "ALTER DATABASE $dbname OWNER to $user;" || {
   exit 1