Improve GitHub Actions CI workflow for cloudflare-ufw-updater

Updated workflow to streamline steps and ensure compatibility with the latest GitHub Actions best practices.
-   Replaced  `actions/setup-bash`  with direct dependency setup since the action is not available.
-   Added ShellCheck installation to validate shell scripts.
-   Enhanced test steps with fail-safe mechanisms to handle UFW environment mocking and restoration.
-   Improved readability and robustness by using conditional logic and better error handling.
-   Ensured correct syntax, indentation, and structure for a clean and maintainable YAML file.

.github/workflows/test.yml

@@ -2,32 +2,42 @@ name: CI
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   build:
     runs-on: ubuntu-latest
+
     steps:
-    - uses: actions/checkout@v3
-    - name: Set up Bash
-      uses: actions/setup-bash@v3
-    - name: Run shellcheck
-      uses: ludeeus/action-shellcheck@master
-      with:
-        severity: error
-    - name: Run tests
-      run: |
-        # Install dependencies (if any)
-        sudo apt-get update
-        sudo apt-get install -y ufw curl
-        # Mock UFW for testing
-        sudo mv /usr/sbin/ufw /usr/sbin/ufw.real
-        sudo touch /usr/sbin/ufw
-        sudo chmod +x /usr/sbin/ufw
-        # Run the script with test arguments
-        ./cloudflare-ufw-updater.sh
-        ./cloudflare-ufw-updater.sh --restore
-        # Restore original UFW
-        sudo mv /usr/sbin/ufw.real /usr/sbin/ufw
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y ufw curl shellcheck
+
+      - name: Run ShellCheck
+        run: |
+          shellcheck cloudflare-ufw-updater.sh
+
+      - name: Prepare environment for tests
+        run: |
+          # Mock UFW for testing
+          sudo mv /usr/sbin/ufw /usr/sbin/ufw.real || true
+          sudo touch /usr/sbin/ufw
+          sudo chmod +x /usr/sbin/ufw
+
+      - name: Run tests
+        run: |
+          # Run the script with test arguments
+          ./cloudflare-ufw-updater.sh
+          ./cloudflare-ufw-updater.sh --restore
+
+      - name: Restore environment
+        if: always()
+        run: |
+          # Restore original UFW
+          sudo mv /usr/sbin/ufw.real /usr/sbin/ufw || true