How to use the @pluralsight/ps-design-system-build.fs.readFile function in @pluralsight/ps-design-system-build

const renderHtml = async page => {
  const { html, css, ids } = renderStatic(_ =>
    renderToStaticMarkup(React.createElement(page))
  )

  const normalize = await fs.readFile(
    path.join(
      __dirname,
      '..',
      'node_modules',
      '@pluralsight',
      'ps-design-system-normalize',
      'dist',
      'index.css'
    ),
    { encoding: 'utf8' }
  )
  const pageCss = `
    body { background: ${core.colors.gray06}; }
  `

  const template = `