message: Clarify local instructions
diff: # @backstage/create-app
  -This package provides a CLI for creating apps.
  +This package provides a CLI for creating a copy of the Backstage app.
  +
  You can use the flag `--skip-install` to skip the install.
  -## Installation
  +## Usage
  With `npx`:
  @@ -11,6 +12,12 @@ With `npx`:
  $ npx @backstage/create-app
  ```
  +With a local clone of this repo, from the main `create-app/` folder, run:
  +
  +```sh
  +$ yarn backstage-create-app
  +```
  +
  ## Documentation
  - [Backstage Readme](https://github.com/backstage/backstage/blob/master/README.md)
  