打开vue项目（dev）
dev/config/ 路径修改index.js文件
然后对host和pord修改指定的即可
host: 'localhost', // can be overwritten by process.env.HOST port: 8082, // can be overwritten by process.env.PORT, if port is in use, a free one will be determined autoOpenBrowser: false, errorOverlay: true, notifyOnErrors: true, poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-