webpack.config.js

...
return {
  ...
  module: {
    rules: [].concat([ env == 'production' ?
        {
            test: /\.(jpe?g|png|gif|svg)$/i,
            use: [{
                loader: 'file-loader',
                options: {
                    name: '[hash].[ext]',
                    outputPath: '/images',
                    publicPath: '/bundles/images'
                }
            }]
        } : {
            test: /\.(jpe?g|png|gif|svg)$/i,
            use: [{
                loader: 'url-loader',
                options: {
                    limit: 1024 * 1024
                }
            }]
        }
    ])
  },
  ...
}