How to use the @storybook/core/server.getManagerHeadHtml function in @storybook/core

output: {
      filename: 'static/[name].[chunkhash].bundle.js',
      // Here we set the publicPath to ''.
      // This allows us to deploy storybook into subpaths like GitHub pages.
      // This works with css and image loaders too.
      // This is working for storybook since, we don't use pushState urls and
      // relative URLs works always.
      publicPath: '',
    },
    plugins: [
      new HtmlWebpackPlugin({
        filename: 'index.html',
        chunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          managerHead: getManagerHeadHtml(configDir),
          version,
        },
        template: indexHtmlPath,
      }),
      new HtmlWebpackPlugin({
        filename: 'iframe.html',
        excludeChunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          previewHead: getPreviewHeadHtml(configDir),
        },
        template: iframeHtmlPath,
      }),
      new InterpolateHtmlPlugin(process.env),
      new webpack.DefinePlugin(loadEnv({ production: true })),
      new webpack.ContextReplacementPlugin(

output: {
      filename: 'static/[name].[chunkhash].bundle.js',
      // Here we set the publicPath to ''.
      // This allows us to deploy storybook into subpaths like GitHub pages.
      // This works with css and image loaders too.
      // This is working for storybook since, we don't use pushState urls and
      // relative URLs works always.
      publicPath: '',
    },
    plugins: [
      new HtmlWebpackPlugin({
        filename: 'index.html',
        chunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          managerHead: getManagerHeadHtml(configDir),
          version,
        },
        template: indexHtmlPath,
      }),
      new HtmlWebpackPlugin({
        filename: 'iframe.html',
        excludeChunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          previewHead: getPreviewHeadHtml(configDir),
        },
        template: iframeHtmlPath,
      }),
      new InterpolateHtmlPlugin(process.env),
      new webpack.DefinePlugin(loadEnv({ production: true })),
      new Dotenv({ silent: true }),

output: {
      filename: 'static/[name].[chunkhash].bundle.js',
      // Here we set the publicPath to ''.
      // This allows us to deploy storybook into subpaths like GitHub pages.
      // This works with css and image loaders too.
      // This is working for storybook since, we don't use pushState urls and
      // relative URLs works always.
      publicPath: '',
    },
    plugins: [
      new HtmlWebpackPlugin({
        filename: 'index.html',
        chunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          managerHead: getManagerHeadHtml(configDir),
          version,
        },
        template: indexHtmlPath,
      }),
      new HtmlWebpackPlugin({
        filename: 'iframe.html',
        excludeChunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          previewHead: getPreviewHeadHtml(configDir),
        },
        template: iframeHtmlPath,
      }),
      new InterpolateHtmlPlugin(process.env),
      new webpack.DefinePlugin(loadEnv({ production: true })),
      new Dotenv({ silent: true }),

output: {
      filename: 'static/[name].[chunkhash].bundle.js',
      // Here we set the publicPath to ''.
      // This allows us to deploy storybook into subpaths like GitHub pages.
      // This works with css and image loaders too.
      // This is working for storybook since, we don't use pushState urls and
      // relative URLs works always.
      publicPath: '',
    },
    plugins: [
      new HtmlWebpackPlugin({
        filename: 'index.html',
        chunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          managerHead: getManagerHeadHtml(configDir),
          version,
        },
        template: indexHtmlPath,
      }),
      new HtmlWebpackPlugin({
        filename: 'iframe.html',
        excludeChunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          previewHead: getPreviewHeadHtml(configDir),
        },
        template: iframeHtmlPath,
      }),
      new webpack.DefinePlugin(loadEnv({ production: true })),
      new Dotenv({ silent: true }),
    ],

output: {
      filename: 'static/[name].[chunkhash].bundle.js',
      // Here we set the publicPath to ''.
      // This allows us to deploy storybook into subpaths like GitHub pages.
      // This works with css and image loaders too.
      // This is working for storybook since, we don't use pushState urls and
      // relative URLs works always.
      publicPath: '',
    },
    plugins: [
      new HtmlWebpackPlugin({
        filename: 'index.html',
        chunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          managerHead: getManagerHeadHtml(configDir),
          version,
        },
        template: indexHtmlPath,
      }),
      new HtmlWebpackPlugin({
        filename: 'iframe.html',
        excludeChunks: ['manager', 'runtime~manager'],
        chunksSortMode: 'none',
        data: {
          previewHead: getPreviewHeadHtml(configDir),
        },
        template: iframeHtmlPath,
      }),
      new InterpolateHtmlPlugin(process.env),
      new webpack.DefinePlugin(loadEnv({ production: true })),
      new Dotenv({ silent: true }),

const getConfig = options => {
  const entriesMeta = {
    manager: {
      headHtmlSnippet: getManagerHeadHtml(options.configDir, process.env),
    },
  };

  return {
    mode: 'development',
    devtool: '#cheap-module-eval-source-map',
    entry: {
      manager: [require.resolve('../../manager')],
    },
    output: {
      path: path.join(__dirname, 'dist'),
      filename: 'static/[name].bundle.js',
      publicPath: '/',
    },
    plugins: [
      new GeneratePagePlugin(

require.resolve('./globals'),
        `${require.resolve('webpack-hot-middleware/client')}?reload=true`,
      ],
    },
    output: {
      path: path.join(__dirname, 'dist'),
      filename: 'static/[name].bundle.js',
      publicPath: '/',
    },
    plugins: [
      new HtmlWebpackPlugin({
        filename: 'index.html',
        chunks: ['manager'],
        chunksSortMode: 'none',
        data: {
          managerHead: getManagerHeadHtml(configDir),
          version,
        },
        template: indexHtmlPath,
      }),
      new HtmlWebpackPlugin({
        filename: 'iframe.html',
        excludeChunks: ['manager'],
        chunksSortMode: 'none',
        data: {
          previewHead: getPreviewHeadHtml(configDir),
        },
        template: iframeHtmlPath,
      }),
      new InterpolateHtmlPlugin(process.env),
      new webpack.DefinePlugin(loadEnv()),
      new webpack.HotModuleReplacementPlugin(),

require.resolve('./globals'),
        `${require.resolve('webpack-hot-middleware/client')}?reload=true`,
      ],
    },
    output: {
      path: path.join(__dirname, 'dist'),
      filename: 'static/[name].bundle.js',
      publicPath: '/',
    },
    plugins: [
      new HtmlWebpackPlugin({
        filename: 'index.html',
        chunks: ['manager'],
        chunksSortMode: 'none',
        data: {
          managerHead: getManagerHeadHtml(configDir),
          version,
        },
        template: indexHtmlPath,
      }),
      new HtmlWebpackPlugin({
        filename: 'iframe.html',
        excludeChunks: ['manager'],
        chunksSortMode: 'none',
        data: {
          previewHead: getPreviewHeadHtml(configDir),
        },
        template: iframeHtmlPath,
      }),
      new webpack.DefinePlugin(loadEnv()),
      new webpack.HotModuleReplacementPlugin(),
      new CaseSensitivePathsPlugin(),