add query value

src/server/routes/apiv3/attachment.js

@@ -25,7 +25,9 @@ module.exports = (crowi) => {
 
   const validator = {
     retrieveAttachments: [
-      query,
+      query('pageId').isMongoId().withMessage('pageId is required'),
+      query('limit').isNumeric(),
+      query('offset').isNumeric(),
     ],
   };
   /**