Online backup of my offline backup script

offline_backup.sh

#!/bin/sh
set -e

# Simple backup script for offline drives
# Keep a copy on drive with a sources.txt listing the paths this drive should backup
# /mnt/Milpool/Media/Music
# /mnt/Milpool/appdata_backups
# ...

SCRIPT_PATH=$(dirname $(realpath "$0"))
STARTED_AT=$(date --rfc-3339=s)

DESTINATION="${SCRIPT_PATH}/Backups"
SOURCE_ROOT="memorymu.lan:"
SOURCES=$(cat sources.txt)

CURRENT_TRANSFER_LOG="${DESTINATION}/backup-$(date -d "${STARTED_AT}" -u "+%Y%m%d-%H%M%S").log"
LAST_CAPTURED_LOG="${DESTINATION}/last-captured.log"

echo "🛫 SOURCES:"
echo $SOURCES
echo "🛬 DESTINATION: ${DESTINATION}"

for source in $SOURCES
do
  echo "🫣 Backing up ${source} ..."
  rsync --log-file="${CURRENT_TRANSFER_LOG}" -aqP "${SOURCE_ROOT}${source}/" "${DESTINATION}${source}" 
done

echo "${STARTED_AT} -- ${SOURCES}" >> $LAST_CAPTURED_LOG