fix: use docker buildx to set OCI manifest annotation for MCP registry

Regular docker build LABEL only sets image config labels. The MCP
registry requires manifest-level annotations, which need buildx
--annotation flag with --push.

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

Author: luarss

.github/workflows/docker-publish.yml

@@ -21,20 +21,24 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Log in to GitHub Container Registry
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Build Docker image
-        run: make build
-
-      - name: Push Docker image
+      - name: Build and push Docker image
         run: |
           ORFS_VER=$(make --no-print-directory print-ORFS_VERSION)
-          docker tag ghcr.io/luarss/openroad-mcp:$ORFS_VER ghcr.io/luarss/openroad-mcp:"$IMAGE_TAG"
-          docker tag ghcr.io/luarss/openroad-mcp:$ORFS_VER ghcr.io/luarss/openroad-mcp:latest
-          docker push ghcr.io/luarss/openroad-mcp:"$IMAGE_TAG"
-          docker push ghcr.io/luarss/openroad-mcp:latest
+          docker buildx build \
+            --build-arg ORFS_VERSION=$ORFS_VER \
+            --build-arg UV_VERSION=$(make --no-print-directory print-UV_VERSION) \
+            --annotation "manifest:io.modelcontextprotocol.server.name=io.github.luarss/openroad-mcp" \
+            -t ghcr.io/luarss/openroad-mcp:$ORFS_VER \
+            -t ghcr.io/luarss/openroad-mcp:"$IMAGE_TAG" \
+            -t ghcr.io/luarss/openroad-mcp:latest \
+            --push .

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "openroad-mcp"
-version = "0.3.0.dev6"
+version = "0.3.0.dev7"
 authors = [
     {name = "Precision Innovations", email="jluar@precisioninno.com"},
 ]