FROM docker:20-dind-rootless

USER root
RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.tuna.tsinghua.edu.cn/g' /etc/apk/repositories \
    && apk add --no-cache python3 py3-pip shadow \
    && ln -sf python3 /usr/bin/python \
    && python3 -m ensurepip \
    && pip3 install --no-cache --upgrade pip setuptools -i https://pypi.tuna.tsinghua.edu.cn/simple \
    && pip install --no-cache kubernetes requests docker -i https://pypi.tuna.tsinghua.edu.cn/simple \
    && rm -rf /var/cache/apk/* \
    && usermod -aG ping rootless \
    && echo "0       1       *       *       *       run-parts /app/syncimages.py" >> /etc/crontabs/root

WORKDIR /app

COPY . .

RUN chown -R rootless:rootless /app

USER rootless