客户端说未接到服务端相应（503）

[angsheng]

把package.json 中依赖改为了"bufferutil": "^4.0.1"，能够部署，
访问后，服务端无异常，但是客户端报错
an error of server connection occured Error: unexpected server response (503)
at ClientRequest._req.on (F:xxx\node_modules\ws\lib\WebSocket.js:650:26)
at ClientRequest.emit (events.js:198:13)
at HTTPParser.parserOnIncomingClient [as onIncoming] (_http_client.js:556:21)
at HTTPParser.parserOnHeadersComplete (_http_common.js:109:17)
at Socket.socketOnData (_http_client.js:442:20)
at Socket.emit (events.js:198:13)
at addChunk (_stream_readable.js:288:12)
at readableAddChunk (_stream_readable.js:269:11)
at Socket.Readable.push (_stream_readable.js:224:10)
at TCP.onStreamRead (internal/stream_base_commons.js:94:17)

不知何解，求大神解答。

[angsheng]

知道怎么回事了。忘了配置服务端变量了。