Let’s say I want to create new project in IntelliJ IDEA. I click File->New->Project, fill out all fields and get fresh project with structure like this:

.
└── my-project/
    ├── .git
    ├── .idea
    ├── .mvn
    ├── src
    ├── target
    ├── .gitignore
    ├── mvnw
    └── pom.xml

I want to dockerize my application and create volume between my project and filesystem inside docker container. Since I:

1. Want to be able to access Dockerfile from IDE file tree view
2. Don’t want Dockerfile to be in the volume

I decide to create directory app and move all Java/Maven files needed to launch project inside.

.
└── my-project/
    ├── .git
    ├── .idea
    ├── .gitignore
    ├── app/
    │   ├── .mvn
    │   ├── src
    │   ├── target
    │   ├── mvnw
    │   └── pom.xml
    ├── docker/
    │   └── app/
    │       └── Dockerfile
    └── compose.yaml

Everything works fine until by some reason I need to reload Maven project (Right click on pom.xml -> Maven -> Reload project). Then IDE tree view starts to show only files located in my-project/app directory, like this directory is a root of project

.
└── app/
    ├── .mvn
    ├── src
    ├── target
    ├── mvnw
    └── pom.xml

Even if I’m trying to explicitly open my-project directory as a project (File -> Open -> Select "my-project" directory) IDE opens directory my-project/app, not my-project.

1. Why IDEA opens my-project/app directory instead of my-project? I assume IDEA treats directory where pom.xml located as root of project. Is it correct?
2. How I can move pom.xml into subdirectory without breaking IDE tree file view?