2. RUN groupadd -r redis && useradd -r -g redis redis
    3. RUN wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/1.7/gosu-amd64" \
    4.     && chmod +x /usr/local/bin/gosu \
    5. # 设置 CMD，并以另外的用户执行