to be able to pass some config parameters via requests

Hi,
I see that some parameters like `android.key_path` could not set via [POST /api/push](https://github.com/appleboy/gorush?tab=readme-ov-file#post-apipush)

is there a way? if not, should we add this ability to POST requests to prevent deploying multiple **groush** instance?

Start by tracing the POST /api/push endpoint and the handling of the android.key_path parameter in the gorush server. Check how request payloads and instance configuration are separated, then define and test the supported request parameters so the requested configuration can be supplied without deploying multiple instances.

Written by the indexing model from the issue text.