[Fix] Download repository con curl per Windows

- Gitea Actions non clona automaticamente il repo
- Download repo da GitHub come ZIP con curl
- Estrazione con tar (nativo Windows 10+)
- Spostamento files nella working directory
- Fix: working directory vuota, nessun Dockerfile

.gitea/workflows/docker-build.yml

@@ -99,6 +99,21 @@ jobs:
       packages: write
       
     steps:
+      - name: Download repository archive
+        run: |
+          echo Downloading repository from GitHub...
+          curl -L -o repo.zip https://github.com/${{ github.repository }}/archive/refs/heads/${{ github.ref_name }}.zip
+          echo Extracting archive...
+          tar -xf repo.zip
+          echo Moving files to current directory...
+          for /d %%d in (*-${{ github.ref_name }}) do (
+            xcopy "%%d\*" . /E /I /Y
+            rmdir "%%d" /S /Q
+          )
+          del repo.zip
+          echo Repository downloaded and extracted
+        shell: cmd
+
       - name: Debug - Check working directory
         run: |
           echo Current directory: