Compose: fixed host data path and root user so data persists across container recreation

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

README.md

@@ -13,7 +13,7 @@ Add a repository secret `REGISTRY_TOKEN` (a Gitea access token with `write:packa
 ## Run with plain Docker
 ```bash
 mkdir -p data && cp /path/to/Bills_Tracker.xlsx data/
-AppID=money PUID=1000 PGID=1000 TZ=America/New_York docker compose up -d   # then edit the bind path in compose.yaml or symlink
+TZ=America/New_York docker compose up -d   # data is stored in /DATA/AppData/money/data on the host
 ```
 
 ## Starting fresh