[Debug] Verifica secret e usa docker login diretto

- Aggiunto step per verificare che REGISTRY_TOKEN sia configurato
- Sostituito docker/login-action con docker login diretto
- Aggiunto controllo lunghezza token per debug
- Test con comando bash nativo per maggiore compatibilità

.gitea/workflows/docker-build.yml

@@ -43,12 +43,21 @@ jobs:
           echo "Image: ${{ env.IMAGE_NAME }}"
         continue-on-error: true
 
+      - name: Debug - Verify secret is configured
+        run: |
+          if [ -z "${{ secrets.REGISTRY_TOKEN }}" ]; then
+            echo "::error::REGISTRY_TOKEN secret is not configured or is empty!"
+            exit 1
+          else
+            echo "REGISTRY_TOKEN secret is configured (length: ${#REGISTRY_TOKEN})"
+          fi
+        env:
+          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
+
       - name: Log in to Gitea Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ gitea.actor }}
-          password: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login ${{ env.REGISTRY }} -u alessio --password-stdin
+        shell: bash
 
       - name: Extract metadata for Docker
         id: meta