Current with-ant-design-less example has some problems.
- Upgrade next7, console found a 404 error.
> After upgrade next7, .next folder didn't find /static/style.css and there is /static/css/style.chunk.css.
- The /_next/static/style.css link don't need be placed in the <Head> tag. The style.chunk.css file will be add in the head tag automatically after build.
- The project with more pages include _app.js, _document.js...the antd-custom.less will not work well.
> The solution is use `modifyVars` of `lessLoaderOptions`. It work well in my project~
