fix: tune tariffs folder

docker-compose.yml

@@ -14,11 +14,10 @@ services:
     ports:
       - 127.0.0.1:8080:8080
       - 127.0.0.1:${WEBAPP_SERVER_PORT:-8081}:${WEBAPP_SERVER_PORT:-8081}
-    # Optional Tariffs 2.0 config. Put tariffs.json near this compose file,
-    # then uncomment the mount below. If no JSON is mounted, legacy .env
-    # pricing is used.
+    # Tariffs 2.0 configuration. Mount the data directory to persist
+    # changes made via the admin panel.
     # volumes:
-    #   - ./tariffs.json:/app/config/tariffs.json:ro
+    #   - ./data:/app/data
     healthcheck:
       test: ["CMD-SHELL", "wget -qO- http://127.0.0.1:8080/healthz >/dev/null || exit 1"]
       interval: 30s