react-page/config/postcss.config.js

module.exports = (ctx) => ({
  map: ctx.options.map,
  parser: ctx.options.parser,
  plugins: [
    require('postcss-nested'),
    require('postcss-import')({ root: ctx.file.dirname }),

    require('postcss-preset-env')({
      stage: 0,
    }),
  ],
});