Custom Webpack config for Storybook

storybook-webpack.js

const webpackConfig = require("./webpack.config.js");

module.exports = {
  ...,
  core: {
    builder: "webpack5",
  },
  webpackFinal: (config) => ({
    ...config,
    module: {
      rules: webpackConfig.module.rules,
    },
    resolve: {
      ...config.resolve,
      ...webpackConfig.resolve,
    },
  }),
};