I’ve just created a new topic here detailing how to take over the basic integrations. Ideally we need to turn this into docs, but for now, it can live there.
Those steps should get you to a place where you have a config you can modify and your project will use it.
Once you’ve done that you can modify the config to take over the publish plugin python hook and modify the behaviour so that it copies the file to your server.
Not that this is specific to your use case, but I did also write a new topic, that as part of it covered how to take over a publish hook: Publish Plugin default check state.