The database URL's env file lives beside the compose file

Arcane runs compose in its own container, where /mnt/fast/appdata does not
exist, so an absolute env_file path there failed its update with 'env file not
found'. The file is now ipodderx.env in the content project, referred to
relatively.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docker-compose.yml

@@ -10,7 +10,7 @@ services:
       IPX_LOG: "ipx=info"
     # IPX_DATABASE_URL=postgres://... to use Postgres; without it, /data/state.db (SQLite).
     env_file:
-      - /mnt/fast/appdata/ipodderx/database.env
+      - ipodderx.env   # relative: Arcane resolves it inside its own container
     ports:
       - "8099:8099"          # web UI
       - "6881:6881/tcp"      # BitTorrent peers