vue.js如何更改默认端口号8080为指定端口的方法

"scripts": { 
  "dev": "node build/dev-server.js", 
  "build": "node build/build.js", 
  "lint": "eslint --ext .js,.vue src" 
 } 

var uri = 'http://localhost:' + port 

var path = require('path') 

 dev: { 
 env: require('./dev.env'), 
 port: 8080, 
 autoOpenBrowser: true, 
 assetsSubDirectory: 'static', 
 assetsPublicPath: '/', 
 proxyTable: {}, 
 cssSourceMap: false 
}