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Welcome to the dockerfiles wiki!

• https://hub.docker.com/r/library/python/tags/
• https://imagelayers.io/?images=python:3.2
• https://blog.replicated.com/2016/02/05/refactoring-a-dockerfile-for-image-size/
• http://jasonwilder.com/blog/2014/08/19/squashing-docker-images/

Clean up when build

# alpine build
RUN apk add --no-cache --virtual .build-deps \
     # add pkg  \
    && apk del .build-deps \
    && rm -rf /var/cache/apk/*

# apt
 RUN apt-get install -y curl
 # add pkg
 RUN apt-get remove -y curl
 RUN rm -rf /var/lib/apt/lists/*