Update Dockerfile

Author: leezhuuuuu

Dockerfile

@@ -13,9 +13,9 @@ RUN apt-get update && apt-get install -y \
     libssl-dev \
     libffi-dev \
     python3-dev \
-    cython \
     && apt-get clean \
     && pip install --no-cache-dir --upgrade pip \
+    && pip install --no-cache-dir cython \
     && pip install --no-cache-dir -r requirements.txt
 
 # 第二阶段：运行阶段