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Docker

ARG RUBY_VERSION
FROM ruby:${RUBY_VERSION}
LABEL org.opencontainers.image.authors="hanjo@bunix.de"
ENV DEV_PACKAGES="build-base libffi-dev"
RUN apk add --no-cache ${DEV_PACKAGES}
ARG JEKYLL_VERSION
RUN gem install jekyll -v ${JEKYLL_VERSION} --no-document \
&& gem install jekyll-paginate --no-document \
&& gem install jekyll-auto-image --no-document \
&& gem install jekyll-tidy --no-document \
&& gem install jekyll-sitemap --no-document \
&& gem install bigdecimal --no-document \
&& gem install kramdown-parser-gfm --no-document \
&& gem install webrick --no-document
RUN apk del ${DEV_PACKAGES} \
&& rm -rf /var/cache/apk/*