feat(openapi): allow config file options for openapi, validateResponses in test

Author: djMax

config/test.json

@@ -3,6 +3,11 @@
   "logging": {
     "level": "warn"
   },
+  "routing": {
+    "openapi": {
+      "validateResponses": true
+    }
+  },
   "server": {
     "port": 0
   }

src/openapi.ts

@@ -114,5 +114,10 @@ export async function openApi<
     },
   };
 
-  return OpenApiValidator.middleware(_.defaultsDeep(defaultOptions, openApiOptions || {}));
+  const { routing } = app.locals.config;
+  const combinedOptions = {
+    ...(typeof routing.openapi === 'object' ? routing.openapi : {}),
+    ...openApiOptions,
+  };
+  return OpenApiValidator.middleware(_.defaultsDeep(defaultOptions, combinedOptions));
 }