fix: add quoting and error handling for shellcheck compliance

git.sh

@@ -14,7 +14,7 @@ if [ "$1" = "" ]; then
 fi
 if [ "$2" = git.flag ]; then
 #cd to the folder where the git deployment lives
-cd $1
+cd "$1" || exit
 
         if [ -e "git.flag" ]; then
                 slackecho "Deploying to $1"
@@ -23,10 +23,10 @@ cd $1
 
                 #git fetch / reset deployment
                 git fetch --all
-                git reset --hard origin/$3
+                git reset --hard origin/"$3"
 
                 #fix permissions
-                chown www-data:www-data $1 -R
+                chown www-data:www-data "$1" -R
                 slackecho "Completed"
         fi