const path = require('path')const Koa = require('koa')const static = require('koa-static')const httpProxyMiddleware = require('http-proxy-middleware')const koaConnect = require('koa2-connect')const app = new Koa()// 引入静态文件app.use(static(path.join(__dirname, 'dist')))// 代理兼容封装const proxy = function (context, options) {  if (typeof options === 'string') {    options = {      target: options    }  }  return async function (ctx, next) {    await koaConnect(httpProxyMiddleware(context, options))(ctx, next)  }}// 代理配置const proxyTable = {  '/api': {    target: 'http://localhost:3333',    changeOrigin: true  }}Object.keys(proxyTable).map(context => {  const options = proxyTable[context]  // 使用代理  app.use(proxy(context, options))})app.listen(3001, () => console.log('3001'))