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koa搭建node服务怎么检测端口重复自动启用新端口呢？

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koa搭建node服务怎么检测端口重复自动启用新端口呢？

直接就会抛错了，逻辑就是检测到错误过后端口++再重启服务，请问有什么方法呢
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image.png
https://www.npmjs.com/package/portfinder
这个可以返回给你一个当前可用的端口号。

但是这种模式一般只适用于开发阶段，因为对于其他环境来说端口号应该是唯一的，应该去找为什么端口被占用。


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