Run docker compose in a network

so that it can be accessed from external docker services (beta.facem.at)

docker-compose.production.yml

@@ -24,3 +24,7 @@ services:
       - .env.production
 volumes:
   mariadb_data:
+
+networks:
+  facem-backoffice-network:
+    name: facem-backoffice-network
\ No newline at end of file