修改docker配置

Change-Id: I8998ac2a63eb1cafa56d073191dde7dc4e38c05f
diff --git a/Dockerfile b/Dockerfile
index e2a18d5..84e2c1d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,13 +27,16 @@
     ls -la dist/assets
 
 # 生产阶段
-FROM nginx:alpine
+FROM nginx:stable
 
 # 设置时区
 ENV TZ=Asia/Shanghai
-RUN apk add --no-cache tzdata && \
-    cp /usr/share/zoneinfo/$TZ /etc/localtime && \
-    echo $TZ > /etc/timezone
+RUN apt-get update && \
+    apt-get install -y tzdata && \
+    ln -fs /usr/share/zoneinfo/$TZ /etc/localtime && \
+    echo $TZ > /etc/timezone && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
 
 # 清理 nginx 目录
 RUN rm -rf /usr/share/nginx/html/*