[Fix] Clone da repository Gitea invece di GitHub

- Cambiato URL da github.com a gitea.home-nas-ds.org
- Usa REGISTRY_TOKEN per autenticazione git clone
- Embedded credentials nell'URL (username:token@host)
- Risolve: richiesta credenziali GitHub

.gitea/workflows/docker-build.yml

@@ -101,8 +101,8 @@ jobs:
     steps:
       - name: Checkout repository with Git
         run: |
-          echo ===== Cloning repository =====
-          git clone --depth 1 --branch ${{ github.ref_name }} https://github.com/${{ github.repository }}.git repo
+          echo ===== Cloning repository from Gitea =====
+          git clone --depth 1 --branch ${{ github.ref_name }} https://alessio:%REGISTRY_TOKEN%@gitea.home-nas-ds.org/${{ github.repository }}.git repo
           if errorlevel 1 (
             echo Failed to clone repository
             exit /b 1
@@ -120,6 +120,8 @@ jobs:
             dir /B
             exit /b 1
           )
+        env:
+          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
         shell: cmd
 
       - name: Debug - Verify files