feat: add blackwell workflow (#5303)

.github/workflows/release-docker-blackwell.yml

+name: Build Blackwell Docker Image
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  build-dev:
+    if: ${{ github.repository == 'sgl-project/sglang' }}
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Free disk space
+        uses: jlumbroso/free-disk-space@main
+        with:
+          tool-cache: false
+          docker-images: false
+          android: true
+          dotnet: true
+          haskell: true
+          large-packages: true
+          swap-storage: false
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and Push Blackwell Image
+        run: |
+          docker build . -f docker/Dockerfile.blackwell -t lmsysorg/sglang:blackwell --no-cache
+          docker push lmsysorg/sglang:blackwell

docker/Dockerfile.blackwell

@@ -9,11 +9,12 @@ WORKDIR /sgl-workspace
 
 RUN pip3 install --pre torch torchvision torchaudio --index-url https://download.pytorch.org/whl/nightly/cu128
 
-RUN pip3 install nvidia-nccl-cu12==2.26.2.post1 \
-    && pip3 install https://github.com/sgl-project/whl/releases/download/v0.0.8.post1/sgl_kernel-0.0.8.post1+cu128-cp39-abi3-manylinux2014_x86_64.whl \
+RUN pip3 install https://github.com/sgl-project/whl/releases/download/v0.0.8.post1/sgl_kernel-0.0.8.post1+cu128-cp39-abi3-manylinux2014_x86_64.whl \
     && pip3 install setuptools==75.0.0 wheel==0.41.0 scikit-build-core
 
 RUN git clone --depth=1 https://github.com/sgl-project/sglang.git \
-    && pip3 install -e "python[blackwell]"
+    && cd sglang && pip3 install -e "python[blackwell]"
+
+RUN pip3 install nvidia-nccl-cu12==2.26.2.post1 --force-reinstall --no-deps
 
 ENV DEBIAN_FRONTEND=interactive