message: move assetPrefix into publicRuntimeConfig
diff: @@ -4,15 +4,10 @@ const mdx = require('@zeit/next-mdx')
  module.exports = withPlugins([
  mdx({extension: /\.mdx?$/})
  ], {
  - /*
  - * Note: Prefixing assets with the fully qualified deployment URL
  - * makes them available even when the site is served from a path alias, as in
  - * <https://primer.style/components>
  - */
  - assetPrefix: process.env.NOW_URL,
  pageExtensions: ['js', 'jsx', 'md', 'mdx'],
  - sassLoaderOptions: {
  - includePaths: ['node_modules']
  +
  + publicRuntimeConfig: {
  + assetPrefix: process.env.NOW_URL
  },
  webpack(config) {
  