[FEATURE REQUEST] Write the open-im-server/config/openim-push.yml configuration to env

[lincome]

Why this feature?

Convenient modification of push service

Suggested Solution

Read env configuration first, so it won't be lost after restart

Additional Information

No response

[OpenIM-Robot]

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[icey-yu]

Please refer to the following for instructions on modifying the configuration files: https://docs.openim.io/zh-Hans/guides/gettingStarted/dockerCompose