FROM alpine:3.15
  
RUN set -eu; \
    sed -i 's/dl-cdn.alpinelinux.org/mirrors.ustc.edu.cn/g' /etc/apk/repositories; \
    apk add --no-cache tzdata \
    && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
    && echo "Asia/Shanghai" > /etc/timezone \
    && apk del tzdata; \
    addgroup -g 1000 fs \
    && adduser -u 1000 -G fs -s /bin/sh -D fs 

USER fs