whitelisted moment.js locales to reduce bundle size

webpack.config.js

@@ -17,6 +17,8 @@ let config = {
   externals: {
     angular: "angular",
     jquery: "$",
+    moment: "moment",
+    "raven-js": "Raven",
   },
   module: {
     rules: [
@@ -47,7 +49,10 @@ let config = {
       FileSaver: 'file-saver',
       angular: "angular",
       $: "jquery",
+      moment: "moment",
     }),
+    // Restrict the extra locales that moment.js can load; en is always included
+    new webpack.ContextReplacementPlugin(/moment[\/\\]locale$/, /en/),
   ],
   devtool: "cheap-module-source-map",
 };