What is the best directory structure for microservice projects

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I am a beginner learning go-zero. When creating a microservice project, I encountered a problem: how should the directory structure of the microservice project be organized? I carefully read the layout explanation on the official website. I tried to set up the directory structure as described on the official website. Below is my project directory:

example
├── internal
├── pkg
├── restful
 │       └── app
 │       └── admin
├── script
├── service
 │       └── user

I have two HTTP services, app and admin, and an RPC service user.

If I want to create a configuration file or utility package that both app and admin can use, how should I do it? Also, how can I quickly start all services instead of running go run . one by one?