docs: revise from-scratch guide to use starter template

Author: damienwebdev

docs/getting-started/from-scratch.md

@@ -4,28 +4,36 @@ Start a new Magento project with the devcontainer when you don't have an existin
 
 ## Prerequisites
 
+- [Git](https://git-scm.com/)
 - [VS Code](https://code.visualstudio.com/) with the [Dev Containers extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers)
 - [Docker](https://www.docker.com/products/docker-desktop/)
 
 ## Steps
 
-1. Create a project directory and add the devcontainer:
+1. Clone the [starter project from GitHub](https://github.com/graycoreio/magento2-devcontainer-starter)
 
 ```bash
-mkdir my-magento-store && cd my-magento-store
-mkdir -p .devcontainer
-git submodule add https://github.com/graycoreio/magento2-devcontainer.git .devcontainer/magento2-devcontainer
+git clone git@github.com:graycoreio/magento2-devcontainer-starter.git
 ```
 
-2. Run the init script and select your desired Magento version:
+<details>
+<summary>Alternative: manual setup without the starter project</summary>
+
+If you don't want to use the starter project, you can initialize your store manually (this assumes that you have a unix shell):
 
 ```bash
+mkdir my-magento-store && cd my-magento-store
+git init
+mkdir -p .devcontainer
+git submodule add https://github.com/graycoreio/magento2-devcontainer.git .devcontainer/magento2-devcontainer
 .devcontainer/magento2-devcontainer/bin/init.sh
 ```
 
-3. Open in VS Code and click **Reopen in Container** when prompted.
+</details>
+
+2. Open in VS Code and click **Reopen in Container** when prompted.
 
-4. Create the Magento project inside the container:
+3. Create the Magento project inside the container:
 
 ```bash
 composer create-project \
@@ -36,13 +44,13 @@ cp -r /tmp/magento/. /workspace/
 rm -rf /tmp/magento
 ```
 
-5. Run setup:
+4. Run setup:
 
 ```bash
 .devcontainer/magento2-devcontainer/bin/setup-install.sh | bash
 ```
 
-6. Verify the installation:
+5. Verify the installation:
 
 ```bash
 bin/magento --version