Multi-App Configuration Issue

Bắt đầu với tài liệu cấu hình Ionic CLI và tái tạo thiết lập nhiều ứng dụng bằng ionic start my-apps, ionic start app1 --no-deps và một ứng dụng thứ hai trên Ionic CLI 5.2.5. Kiểm tra các tệp ionic.config.json được tạo ra và xác định xem hành vi thư mục gốc dùng chung được ghi lại trong tài liệu có khớp với CLI hay không. Được xem là hoàn tất khi hành vi cấu hình được mong đợi đã được xác lập và vấn đề trong tài liệu hoặc CLI đã được xác định rõ ràng.

Describe the bug
https://ionicframework.com/docs/cli/configuration#config-file

In a multi-app project, apps share a single ionic.config.json file at the root of the repository instead of each app having their own.

Is this correct for the latest version of Ionic?
I created the multi-apps with no-deps parameter and both apps also have their own ionic-config.json. Also .gitignore, tslint.json, package.json.

To Reproduce

1. Create the root project. ionic start my-apps (blank template)
2. Open the ionic.config.json and add the property "projects": {}.
3. Create your apps by ionic start app1 --no-deps. (app1 and app2) (blank template)
4. See that every app has its own ionic.config.json.

Expected behavior
I'm not sure how the multi-app feature of Ionic works.
I though I have a root project with all the project files like package.json and ionic.config.json.
And the "sub-apps" only contains the sources without separated configuration files etc.
Ok they can have a package.json. But why are there all the dependencies, even though the root dependencies should be used? Or do I understand something wrong? Or is the documentation wrong?

Screenshots
If applicable, add screenshots to help explain your problem.

Browser and OS (please complete the following information):

• OS: Windows 10 Pro 64-bit (1903)
• Ionic CLI: 5.2.5

Additional context
I want to create one app base (root) with multi-app feature. Each apps should use the shared root components, services, etc. But an app can also have their own components.
TSLint, TSConfig, Unit-Test-Config, gitignore, etc. should be shared. But currently each subapp have a own config. Exactly the same. DRY.
Maybe this is a bug for the Ionic core repository or CLI? But perhaps it's only a documentation issue. I don't know who this should actual work. This is my first attempt of building a multi-app.
But the fact is, each app in a multi-app project has its own ionic.config.json. The docs says there should only be one shared in the root. Or does this mean, I should delete the config files in my sub-apps?