Dockerfile

FROM ruby:2.5.3-slim

LABEL com.acrosszuniverse.maintainer-name="Paul-Emmanuel Raoul"
LABEL com.acrosszuniverse.maintainer-email="skyper@skyplabs.net"

ARG DEBIAN_FRONTEND=noninteractive

ENV LC_ALL=C.UTF-8

RUN apt-get update                                                      &&\
    apt-get install -y --no-install-recommends \
        gcc g++ make patch git curl apt-transport-https gnupg2          &&\
    curl -sL https://deb.nodesource.com/setup_10.x | bash -             &&\
    curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -   &&\
    echo "deb https://dl.yarnpkg.com/debian/ stable main" \
        | tee /etc/apt/sources.list.d/yarn.list                         &&\
    apt-get update                                                      &&\
    apt-get install -y --no-install-recommends nodejs yarn

WORKDIR /usr/src/app

COPY Gemfile /usr/src/app
COPY Gemfile.lock /usr/src/app

RUN yes | gem update --system --force       &&\
    gem install bundler                     &&\
    bundle install                          &&\
    rm -f Gemfile Gemfile.lock

EXPOSE 4000

CMD ["bundle", "exec", "jekyll", "serve", "--host", "0.0.0.0", "--watch", "--drafts", "--future"]