Explcitly depend on moment

services/web/package.json

@@ -40,6 +40,7 @@
     "metrics-sharelatex": "git+https://github.com/sharelatex/metrics-sharelatex.git#v1.7.1",
     "mimelib": "0.2.14",
     "mocha": "1.17.1",
+    "moment": "^2.18.1",
     "mongojs": "2.4.0",
     "mongoose": "4.11.4",
     "multer": "^0.1.8",