Fix: Use localhost for registry URL in Ansible deployment

- Registry only binds to 127.0.0.1:5000 (not external interface)
- Deployment runs on server, so localhost access is correct
- External access still available via Traefik (registry.michaelschiemer.de)

deployment/ansible/inventory/production.yml

@@ -9,8 +9,10 @@ all:
 
   vars:
     # Docker Registry
-    docker_registry: git.michaelschiemer.de:5000
-    docker_registry_url: git.michaelschiemer.de:5000
+    # Use localhost for internal access (registry only binds to 127.0.0.1:5000)
+    # External access via Traefik: registry.michaelschiemer.de
+    docker_registry: localhost:5000
+    docker_registry_url: localhost:5000
     # Registry credentials (can be overridden via -e or vault)
     # Defaults are set here, can be overridden by extra vars or vault
     docker_registry_username_default: 'admin'