webpack构建React环境:
	https://ke.qq.com/course/285826?tuin=2a26ba34

1. 下载react相关安装包
	cnpm i
		babel-core
		babel-loader
		babel-preset-env
		babel-preset-stage-0

		react
		react-dom
		babel-preset-react


	预设一定记得配置:
		1. 参数
		2. .babelrc
2. HtmlWebpackPlugin
	cnpm i html-webpack-plugin
3. 配置webpack.config.js
	....
4. 安装webpack相关模块
	cnpm i
		webpack-dev-server
		webpack
		webpack-cli