[Feature]: 能支持从环境变量指定端口吗 || [Feature]: Can the port be specified from the environment variable?

[lijc210]

功能概述 | Describe the feature

因为要从 docker 启动，在腾讯云函数环境下，应用必须要以 9000 端口启动

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Feature Overview | Describe the feature

Because it needs to be started from docker, in the Tencent Cloud function environment, the application must be started with port 9000