chore(deploy): 移除Alpine镜像中国镜像源配置

- 删除了阿里云镜像源设置，恢复默认apk仓库配置
- 简化了Dockerfile中系统操作部分的镜像源处理
- 保持基础镜像的官方仓库更新操作不变
- 提高Dockerfile在不同网络环境下的通用性

deploy/Dockerfile

@@ -29,10 +29,6 @@ ENV TZ=Asia/Shanghai \
 # Switch to root to perform system operations
 USER root
 
-# Set up Alpine repositories (use China mirror for faster downloads)
-RUN echo "https://mirrors.aliyun.com/alpine/v3.22/main/" > /etc/apk/repositories && \
-    echo "https://mirrors.aliyun.com/alpine/v3.22/community/" >> /etc/apk/repositories
-
 # Install runtime dependencies
 RUN apk update && \
     apk upgrade && \