之前还可以启动的，现在开了服务器就不行了，不知道什么原因。是因为axios配置那边的2000ms超时吗？
报错信息：

17:27:29  ERROR  Request failed with status code 500
  at createError (node_modules\axios\lib\core\createError.js:16:15)
  at settle (node_modules\axios\lib\core\settle.js:18:12)
  at IncomingMessage.handleStreamEnd (node_modules\axios\lib\adapters\http.js:201:11)
  at IncomingMessage.emit (events.js:187:15)
  at IncomingMessage.EventEmitter.emit (domain.js:442:20)
  at endReadableNT (_stream_readable.js:1086:12)
  at process._tickCallback (internal/process/next_tick.js:63:19)

axios.js代码：

import axios from 'axios'

const instance = axios.create({
    baseURL:`http://${process.env.HOST||'localhost'}:${process.env.PORT||3000}`,
    timeout:2000,
    headers:{
        
    }
})

export default instance