add metax sentence-transformers engine

Signed-off-by: Sun Ruoxi <sunruoxi@4paradigm.com>

Dockerfile

@@ -0,0 +1,16 @@
+FROM git.modelhub.org.cn:9443/enginex-metax/vllm:0.9.1
+
+WORKDIR /workspace
+
+# 复制 requirements.txt 并安装 Python 依赖
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# 复制 server.py 到 workspace
+COPY server.py /workspace/
+
+# 暴露端口
+EXPOSE 8000
+
+# 启动服务
+CMD ["uvicorn", "server:app", "--host", "0.0.0.0", "--port", "8000"]