Fix: use GITHUB_OUTPUT instead of GITEA_OUTPUT in CI/CD workflow

Gitea Actions uses GITHUB_OUTPUT to set step outputs, not GITEA_OUTPUT.
This was causing version and minor variables to be empty, so only the
'latest' tag was pushed to the registry. Added debug logging to help
diagnose future issues.

Co-authored-by: Junie <junie@jetbrains.com>

.gitea/workflows/docker.yml

@@ -21,13 +21,15 @@ jobs:
       - name: Extract version from tag
         id: version
         run: |
-          # Remove 'v' prefix from tag (e.g., v0.1.0 → 0.1.0)
+          # Remove 'refs/tags/v' prefix from tag (e.g., refs/tags/v0.1.0 → 0.1.0)
           VERSION=$(echo "${{ gitea.ref }}" | sed 's|refs/tags/v||')
-          echo "version=${VERSION}" >> "${GITEA_OUTPUT}"
+          echo "Extracted version: ${VERSION}"
+          echo "version=${VERSION}" >> "${GITHUB_OUTPUT}"
 
           # Extract major.minor for minor tag (e.g., 0.1.0 → 0.1)
           MINOR=$(echo "${VERSION}" | sed 's/\.[0-9]*$//')
-          echo "minor=${MINOR}" >> "${GITEA_OUTPUT}"
+          echo "Extracted minor: ${MINOR}"
+          echo "minor=${MINOR}" >> "${GITHUB_OUTPUT}"
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3