implement basic automatic backup

scripts/volume-backup.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+THINGY_DIR="/home/fedora/thingy" # todo: better
+LOG_FILE="/var/log/volume-backup.log"
+
+function log() {
+    echo "[$(date -Iseconds)] $*" | tee -a "$LOG_FILE"
+}
+
+function cleanup() {
+    log "cleanup: starting docker services"
+    docker compose start || true
+    log "└───── backup finished ─────┘"
+}
+trap cleanup EXIT
+
+log "┌────── backup started ─────┐"
+
+cd "$THINGY_DIR"
+
+log "stopping docker services"
+docker compose stop
+
+log "running backup"
+/usr/local/bin/vykar backup