don't use fedora as user for paths

scripts/volume-backup.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-THINGY_DIR="/home/fedora/thingy" # todo: better
+WORKING_DIR="/home/admin/thingy" # todo: better
 LOG_FILE="/var/log/volume-backup.log"
 
 function log() {
@@ -17,7 +17,7 @@ trap cleanup EXIT
 
 log "┌────── backup started ─────┐"
 
-cd "$THINGY_DIR"
+cd "$WORKING_DIR"
 
 log "stopping docker services"
 docker compose stop