create-react-admin does not include `.gitignore` file

[slax57]

What you were expecting:

Using npm create react-admin to bootstrap a new app should include a .gitignore file, regardless of the choices made during setup.

What happened instead:
The file is not present.

Steps to reproduce:

1. Run npm create react-admin my-app
2. Choose no dataProvider
3. Choose no authProvider
4. Add only a "posts" resource
5. Choose "npm"

(not sure if the choices are relevant here, but figured I'd provide the ones I used anyway)

Environment

• create-react-admin@4.14.0