How to use the metro/src/Server function in metro

process.env.NODE_ENV = args.dev ? 'development' : 'production';

  let sourceMapUrl = args.sourcemapOutput;
  if (sourceMapUrl && !args.sourcemapUseAbsolutePath) {
    sourceMapUrl = path.basename(sourceMapUrl);
  }

  const requestOpts: RequestOptions = {
    entryFile: args.entryFile,
    sourceMapUrl,
    dev: args.dev,
    minify: args.minify !== undefined ? args.minify : !args.dev,
    platform: args.platform,
  };

  const server = new Server(config);

  try {
    const bundle = await output.build(server, requestOpts);

    await output.save(bundle, args, logger.info);

    // Save the assets of the bundle
    const outputAssets: AssetData[] = await server.getAssets({
      ...Server.DEFAULT_BUNDLE_OPTIONS,
      ...requestOpts,
      bundleType: 'todo',
    });

    // When we're done saving bundle output and the assets, we're done.
    return await saveAssets(outputAssets, args.platform, args.assetsDest);
  } finally {