fix: Improve Docker data persistence for Coolify deployments

- Update docker-compose.yml to use latest image tag
- Add DB_PATH environment variable for explicit database location
- Configure bind mount for better data persistence in Coolify
- Add VOLUME directive in Dockerfile for data directory
- Ensure database survives container updates and restarts

🤖 Generated with [Claude Code](https://claude.ai/code)

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

docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   ap-pos:
-    image: marcogll/ap_pos:1.3.1
+    image: marcogll/ap_pos:latest
     container_name: ap-pos
     restart: unless-stopped
     ports:
@@ -8,6 +8,7 @@ services:
     environment:
       NODE_ENV: production
       SESSION_SECRET: ${SESSION_SECRET:-your-very-secret-key-change-it-in-production}
+      DB_PATH: /app/data/ap-pos.db
     volumes:
       - ap_pos_data:/app/data
     healthcheck:
@@ -20,3 +21,7 @@ services:
 volumes:
   ap_pos_data:
     driver: local
+    driver_opts:
+      type: none
+      o: bind
+      device: ./data