docker安装python

dockerfile

FROM python:3.6.8

WORKDIR /home

RUN apt-get update \
  && apt-get install -y --no-install-recommends cron \
  && rm -rf /var/lib/apt/lists/* \
  && apt-get clean \
  && echo "import datetime\nprint(datetime.datetime.now().strftime(\"%Y-%m-%d %H:%M:%S\"))" >> /home/a.py \
  && echo "*/1 * * * * root python3 /home/a.py >> /home/log.txt" >> /etc/crontab

ENV LC_ALL C.UTF-8
CMD PYTHONIOENCODING=utf-8 /etc/init.d/cron start && touch log.txt && tail -f log.txt