docs: describe a setup action on a higher level

docs/content/guides/6.multistore/2.tooling-and-concepts/4.deployment/8.ci-cd.md

@@ -41,78 +41,53 @@ Let's look at how continuous integration works in a multistore setup, using GitH
 First, we need to set up the environment. Our setup action handles several crucial steps:
 
 ::tip Why a Separate Setup Action?
-We use a separate setup action to follow the DRY (Don't Repeat Yourself) principle, as these setup steps are used in multiple workflows - for instance `continuous-integration.yml` and `continuous-deployment.yml`. However, you can include these steps directly in your workflow if you prefer - there's no technical requirement to have them as a separate action.
+We use a separate setup action to follow the DRY (Don't Repeat Yourself) principle, as these setup steps are used in multiple workflows. We've implemented it as a [composite action](https://docs.github.com/en/actions/sharing-automations/creating-actions/creating-a-composite-action) to make it reusable across different workflows.
 ::
 
-Here's how our setup action is defined:
+The Setup action performs these steps in sequence:
 
-```yaml
-name: Setup repository
-description: Installs all the packages and initializes environment variables
+1. **Node.js Setup**
+   - Uses Node.js version specified in `.nvmrc` file
 
-# Define required inputs for npm registry authentication
-inputs:
-  npm_user:
-    description: Enterprise NPM registry user
-    required: true
-  npm_password:
-    description: Enterprise NPM registry password
-    required: true
-  npm_email:
-    description: Enterprise NPM registry email
-    required: true
+2. **Cache Configuration**
+   - Sets up Yarn cache for `node_modules` directory to speed up installations
+   - Configures Turbo build cache for faster builds. Read more about Turbo CI caching [here](https://turbo.build/repo/docs/guides/ci-vendors).
 
-runs:
-  using: composite
-  steps:
-    - name: Set up Node.js
-      uses: actions/setup-node@v4
-      with:
-        node-version-file: ./.nvmrc
-
-    # Configure Yarn cache to speed up installations
-    - name: Yarn cache
-      uses: actions/cache@v4
-      with:
-        path: .yarn
-        key: storefront-yarn-cache
-
-    # Set up Turbo cache for faster builds
-    - name: Cache turbo build setup
-      uses: actions/cache@v4
-      with:
-        path: .turbo
-        key: starter-turbo-${{ github.sha }}
-        restore-keys: |
-          starter-turbo-
-
-    # Configure access to private npm registry
-    - name: Configure NPM registry
-      shell: bash
-      run: |
-        npm install -g npm-cli-login;
-        npm-cli-login -u ${{ inputs.npm_user }} -p ${{ inputs.npm_password }} -e ${{ inputs.npm_email }} -r https://registrynpm.storefrontcloud.io || exit 1;
-
-    # Install all project dependencies
-    - name: Install dependencies
-      shell: bash
-      # We use frozen-lockfile to ensure consistent dependencies across all environments
-      # This is important for CI/CD to avoid unexpected issues
-      # We run init.mjs to ensure the project is properly initialized
-      run: yarn install --frozen-lockfile --cache-folder .yarn && node init.mjs
-```
+3. **NPM Registry Access**
+   - Configures access to private npm registry
+   - Uses provided credentials for authentication
+   ```bash
+   # Install npm-cli-login globally
+   npm install -g npm-cli-login
+
+   # Configure access to Alokai Enterprise Registry
+   npm-cli-login \
+     -u $NPM_USER \
+     -p $NPM_PASSWORD \
+     -e $NPM_EMAIL \
+     -r "https://registrynpm.storefrontcloud.io"
+
+   # You can verify the configuration by running the following command:
+   npm config get @alokai:registry
+   # Should return: https://registrynpm.storefrontcloud.i
+   ```
+
+4. **Dependencies Installation**
+   - Installs project dependencies using Yarn
+   - Uses frozen lockfile for consistency
+   - Runs initialization script
+   ```bash
+   # Install dependencies with frozen lockfile
+   yarn install --frozen-lockfile --cache-folder .yarn
+
+   # Run initialization script
+   node init.mjs
+   ```
 
-And here's how we use it in our workflow:
+Here's how to use it in your workflow:
 
 ```yaml
 steps:
-  # 1. Check out your code
-  - name: Checkout code
-    uses: actions/checkout@v4
-    with:
-      fetch-depth: 0  # Important: Need full git history for change detection
-
-  # 2. Set up environment using our custom action
   - name: Install dependencies
     uses: ./.github/actions/setup
     with: