Use git tag for Docker image versioning instead of semver

• Add step to get latest git tag
• Replace semver with raw tag value
• Maintain latest tag for default branch
• Fix tag resolution in CI pipeline

.github/workflows/docker-publish.yml

@@ -26,13 +26,19 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Get latest tag
+        id: get_tag
+        run: |
+          TAG=$(git describe --tags --abbrev=0)
+          echo "tag=$TAG" >> $GITHUB_OUTPUT
+
       - name: Extract metadata for Docker
         id: meta
         uses: docker/metadata-action@v5
         with:
           images: ghcr.io/${{ github.repository }}
           tags: |
-            type=semver,pattern={{version}}
+            type=raw,value=${{ steps.get_tag.outputs.tag }}
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push Docker image