I joined co-development by git for the first time.

I tried to add one file.

`$ git add event.controller.ts`

Then I confirmed the status

`$ git status`

```
On branch event-api
Your branch is behind 'origin/develop' by 9 commits, and can be fast-forwarded.
  (use "git pull" to update your local branch)

Changes to be committed:
  (use "git restore --staged <file>..." to unstage)
        new file:   ../entities/event.entity.ts
        new file:   dto/event.dto.ts
        new file:   event.controller.spec.ts
        new file:   event.controller.ts
        new file:   event.module.ts
        new file:   event.service.spec.ts
        new file:   event.service.ts
        new file:   ../repositories/event.repository.ts

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        ../../.env

```

It seems that 8 files was added to stage.

Why this occured? and how can I fix it ?

If someone has opinion, please let me know

Thanks