Nuxt/test/fixtures/custom-dirs/nuxt.config.js

module.exports = {
  css: [{ src: '~/custom-assets/app.css' }],
  dir: {
    assets: 'custom-assets',
    layouts: 'custom-layouts',
    middleware: 'custom-middleware',
    pages: 'custom-pages',
    static: 'custom-static',
    store: 'custom-store'
  }
}