FROM ubuntu:18.04
LABEL maintainer="james@example.com"
ENV REFRESHED_AT 2016-06-01

RUN apt-get -qq update
RUN apt-get -qq install ruby ruby-dev libffi-dev build-essential nodejs
RUN gem install --no-rdoc --no-ri jekyll -v 2.5.3

VOLUME /data
VOLUME /var/www/html
WORKDIR /data

ENTRYPOINT [ "jekyll", "build", "--destination=/var/www/html" ]