Add json-loader for moment-timezone.

bikeshop_project/webpack.dev.config.js

@@ -41,6 +41,10 @@ config.module.loaders.push(
   {
     test: /(\.scss|\.css)$/,
     loader: ExtractTextPlugin.extract('style', 'css?sourceMap&modules&importLoaders=1&localIdentName=[name]__[local]___[hash:base64:5]!postcss!sass?sourceMap!toolbox'),
+  },
+  {
+    test: /\.json$/,
+    loader: 'json-loader',
   }
 );