add backup image

images/backup/backup.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+set -e
+
+if [ -z "$RESTIC_PASSWORD" ]; then
+  echo "Error: RESTIC_PASSWORD environment variable is not set." >&2
+  exit 1
+fi
+
+RESTIC_REPOSITORY="/mnt/backup"
+SOURCE_DIR="/mnt/source"
+
+mkdir -p "$SOURCE_DIR"
+mkdir -p "/mnt/backup"
+
+echo "Starting Restic backup from $SOURCE_DIR to $RESTIC_REPOSITORY"
+
+echo "Checking/Initializing Restic repository..."
+restic init --repository "$RESTIC_REPOSITORY" || true
+
+echo "Running Restic backup..."
+restic backup \
+  "$SOURCE_DIR" \
+  --verbose \
+  --tag "daily" \
+  --exclude-cache \
+
+if [ $? -eq 0 ]; then
+  echo "Restic backup completed successfully!"
+else
+  echo "Restic backup failed!"
+  exit 1
+fi
+
+echo "Backup finished."