sometimes do hot backups

docs/backups.md

@@ -11,7 +11,8 @@ always remember to `docker compose stop` before doing any of this!
 - to back up automatically, run `sudo EDITOR=micro crontab -e` and add the following:
   ```
   TZ=UTC
-  0 6 * * * /home/admin/atom.town/scripts/volume-backup.sh
+  0 6 * * * /home/admin/atom.town/scripts/volume-backup.sh cold
+  0 0,12,18 * * * /home/admin/atom.town/scripts/volume-backup.sh hot
   ```
 
 **restoring**

scripts/volume-backup.sh

@@ -8,19 +8,30 @@ function log() {
     echo "[$(date -Iseconds)] $*" | tee -a "$LOG_FILE"
 }
 
+MODE="${1:-cold}"
+if [[ "$MODE" != "cold" && "$MODE" != "hot" ]]; then
+    log "usage: $0 [cold|hot]" >&2
+    exit 1
+fi
+
 function cleanup() {
-    log "cleanup: starting docker services"
+    if [[ "$MODE" == "cold" ]]; then
+        log "starting docker services"
         docker compose start || true
+    fi
     log "└───── backup finished ─────┘"
 }
 trap cleanup EXIT
 
 log "┌────── backup started ─────┐"
+log "mode: $MODE"
 
 cd "$WORKING_DIR"
 
+if [[ "$MODE" == "cold" ]]; then
     log "stopping docker services"
     docker compose stop
+fi
 
 log "running backup"
-/usr/local/bin/vykar backup
+/usr/local/bin/vykar backup 2>&1 | tee -a "$LOG_FILE"