FROM ubuntu:18.04

WORKDIR /repo
RUN \
        apt-get update && \
        DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends ruby ruby-dev rubygems build-essential \
        git wget unzip openjdk-11-jre-headless python3-sphinx python3-sphinx-rtd-theme && \
        rm -rf /var/lib/apt/lists/* && \
        gem install --no-document --no-ri --no-rdoc fpm
