Update docker override example.

.pre-commit-config.yaml

@@ -10,6 +10,9 @@ repos:
       - id: trailing-whitespace
       - id: end-of-file-fixer
       - id: check-yaml
+        # Compose override uses the !override extension tag (valid only for
+        # Docker Compose >= 2.24, unknown to plain YAML parsers).
+        exclude: ^deploy/vps/docker-compose\.override\.example\.yml$
       - id: check-toml
       - id: check-added-large-files
       - id: check-merge-conflict

deploy/vps/docker-compose.override.example.yml

@@ -8,9 +8,9 @@
 
 services:
   nginx:
-    ports:
+    ports: !override
       - "127.0.0.1:8081:80"
-    volumes:
+    volumes: !override
       # Same target path as the base file's TLS template bind — overrides it,
       # so only ONE template is rendered (both define `upstream api`).
       - ./deploy/nginx/templates/contract-check-http.conf.template:/etc/nginx/templates/contract-check.conf.template:ro