perf(dockerfile): ubuntu 18.04修改时区为Asia/Shanghai

dockerfiles/system_mirror/Dockerfile

@@ -5,11 +5,14 @@ FROM ubuntu:18.04
 LABEL maintainer "zhujian <zjzstu@github.com>"
 
 COPY sources.list .
+ENV DEBIAN_FRONTEND=noninteractive
 RUN mv sources.list /etc/apt/sources.list && \
 	apt-get update && \
-	apt-get install -y locales && \
+	apt-get install -y locales tzdata && \
 	locale-gen zh_CN.UTF-8 && \
 	update-locale LANG=zh_CN.UTF-8 LANGUAGE=zh_CN.UTF-8 LC_ALL=zh_CN.UTF-8 && \
+	ln -fs /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
+	dpkg-reconfigure --frontend noninteractive tzdata && \
     find /var/lib/apt/lists -type f -delete && \
     find /var/cache -type f -delete