add package for

gridfs

package.json

@@ -93,6 +93,7 @@
     "mkdirp": "~0.5.1",
     "module-alias": "^2.0.6",
     "mongoose": "^5.0.0",
+    "mongoose-gridfs": "^0.5.0",
     "mongoose-paginate": "^5.0.0",
     "mongoose-unique-validator": "^2.0.0",
     "multer": "~1.3.0",