webpack config: another fix to broken regex

{{cookiecutter.app_name}}/webpack.config.js

@@ -43,7 +43,7 @@ module.exports = {
       { test: /\.html$/, loader: 'raw-loader' },
       { test: /\.css$/, loader: ExtractTextPlugin.extract({fallback: 'style-loader', use: 'css-loader' }) },
       { test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/, loader: 'url-loader?limit=10000&mimetype=application/font-woff' },
-      { test: /\.(ttf|eot|svg|png|jpe?g|gif|ico)(\?.*)$/i,
+      { test: /\.(ttf|eot|svg|png|jpe?g|gif|ico)(\?.*)?$/i,
         loader: 'file-loader?context=' + rootAssetPath + '&name=[path][name].[hash].[ext]' },
       { test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader', query: { presets: ['es2015'], cacheDirectory: true } },
     ]