Update Dockerfile

Dockerfile

@@ -3,7 +3,7 @@ FROM ubuntu
 # 设置时区
 RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
     echo 'Asia/Shanghai' >/etc/timezone
-RUN apt update && sudo apt upgrade -y
+RUN apt update && apt upgrade -y
 # 更新并安装所需的包
 RUN apt install -y \
         wget \