fix: tag Docker images as latest + semver instead of branch name

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Former-commit-id: c84cba927a

.github/workflows/docker-publish.yml

@@ -40,6 +40,10 @@ jobs:
         uses: docker/metadata-action@v5.0.0
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}-frontend
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push Docker image
         id: build-and-push
@@ -79,6 +83,10 @@ jobs:
         uses: docker/metadata-action@v5.0.0
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}-backend
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push Docker image
         id: build-and-push