Fix linting errors within server.rails.config and hot.config

Author: dylangrafmyre

client/webpack.client.hot.config.js

@@ -46,7 +46,7 @@ config.module.loaders.push(
               transform: 'react-transform-hmr',
               imports: ['react'],
               locals: ['module'],
-            }
+            },
           ],
         },
       },

client/webpack.server.rails.config.js

@@ -17,7 +17,7 @@ module.exports = {
   plugins: [
     new webpack.DefinePlugin({
       'process.env': {
-        'NODE_ENV': JSON.stringify('production'),
+        NODE_ENV: JSON.stringify('production'),
       },
     }),
   ],