Sync folder using Lftp. you need to install Lftp to use this script on you system

deploy.sh

#!/bin/bash
HOST='yourwebsite.com'
USER='your_username_here'
PASS='your_password_here'
TARGETFOLDER='/remote_folder'
SOURCEFOLDER='/home/myuser/local_folder'

lftp -f "
open $HOST
user $USER $PASS
lcd $SOURCEFOLDER
mirror --reverse --delete --verbose $SOURCEFOLDER $TARGETFOLDER
bye
"