react-app-rewiredでwebpack-bundle-analyzerを使用する

const rewireWebpackBundleAnalyzer = require('react-app-rewire-webpack-bundle-analyzer')

module.exports = function override(config, env) {
  // ...

  if (env === 'production') {
    config = rewireWebpackBundleAnalyzer(config, env, {
      analyzerMode: 'static',
      reportFilename: 'report.html'
    })
  }

  return config
}