Laravel 5.4 的新 Laravel-mix 使用中遇到些问题

执行 npm run hot

    npm run hot

    > @ hot /Users/zyxcba/www/taotaoe
    > node node_modules/cross-env/bin/cross-env.js NODE_ENV=development node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js

    fallbackLoader option has been deprecated - replace with "fallback"
    loader option has been deprecated - replace with "use"
    Project is running at http://localhost:8080/
    webpack output is served from http://localhost:8080/
    404s will fallback to /index.html
     DONE  Compiled successfully in 7623ms

访问页面的时候， css 地址已经是 http://localhost:8080/css/app.xxxx.css， 但请求返回是 404.
public/css/app.xxxx.css 文件存在。