FROM jekyll/jekyll:4.0.0
USER root
RUN gem install \
	html-proofer:3.10.2 \
	nokogiri:1.10.1 \
	jekyll-autoprefixer:1.0.2 \
	jekyll-inline-svg:1.1.4 \
	jekyll-paginate:1.1.0 \
	kramdown-parser-gfm:1.1.0 \
	jekyll-relative-links:0.6.1
CMD ["/usr/gem/gems/jekyll-4.0.0/exe/jekyll", "build", "-t", "-s", "/input", "-d", "/output"]