Webpack copy plugin

webpack.config.js

var Copy = require('copy-webpack-plugin');
// ...
{
  // ...
  plugins: [
    new Copy({
      from: 'assets/fonts',
      to: 'fonts', // path relative to the build folder
      toType: 'dir', // or 'file'
      ignore: ['*.json'] // We can skip files
    })
  ]
  // ...
}