GitHub user MaplePc added a comment to the discussion: 5.x 版本 proxy
默认的8080端口，可以自定义吗
It looks like there's no document to refer, and my file is below:
```
{
"rocketMQClusterName": "DefaultCluster",
"grpcServerPort": 8091,
"remotingListenPort": 8090
}
```
You can edit it in need.
GitHub link:
https://github.com/apache/rocketmq/discussions/7174#discussioncomment-8171426
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