Fix docker-compose.yml - remove external network

Remove 'external: true' from the fiscal network to allow Docker Compose
to create it automatically during deployment. This fixes the deployment
failure in Coolify where the network doesn't exist.

docker-compose.yml

@@ -57,4 +57,5 @@ volumes:
 
 networks:
   fiscal:
-    external: true
+    # Remove external: true to let Docker Compose create the network automatically
+    # This is required for Coolify deployment where the network doesn't exist yet