diff --git a/New_College.Api/Dockerfile b/New_College.Api/Dockerfile
index 2aa9f96..01e616e 100644
--- a/New_College.Api/Dockerfile
+++ b/New_College.Api/Dockerfile
@@ -1,7 +1,12 @@
+# 使用 SDK 镜像作为构建基础
 FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
-RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
-RUN echo 'Asia/Shanghai' >/etc/timezone
+ENV TZ=Asia/Shanghai
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+# 设置工作目录
 WORKDIR /app
-COPY --from=build /app ./
+
+# 暴露应用端口
 EXPOSE 8081
+COPY . .
+# 设置容器启动命令
 ENTRYPOINT ["dotnet", "New_College.Api.dll","-b","0.0.0.0"]