Source for our Rails CI containers. Repo at https://github.com/spacebabies/rails-ci

Dockerfile

FROM ruby:2.5.1-slim

MAINTAINER Space Babies <info@spacebabies.nl>
LABEL description="Continuous Integration of our Rails apps"

# Install dependencies:
# - libxml2, zlib1g-dev, liblzma-dev: nokogiri and friends
# - libpq-dev: needed to build `pg`
# - libmysqlclient-dev: needed to build `mysql2`
RUN apt-get update --quiet && apt-get install --no-install-recommends --quiet --yes \
  build-essential \
  locales \
  patch \
  libxml2 \
  libxml2-dev \
  zlib1g-dev \
  liblzma-dev \
  nodejs \
  tzdata \
  default-libmysqlclient-dev \
  libpq-dev \
  git \
  pdftk \
  imagemagick \
  httpie && \
  rm -rf /var/lib/apt/lists/*

# Generate UTF-8 and make it default locale.
RUN dpkg-reconfigure locales && \
  locale-gen C.UTF-8 && \
  /usr/sbin/update-locale LANG=C.UTF-8

# Our choices go in ENV for everyone to enjoy.
ENV LC_ALL C.UTF-8
ENV TZ=UTC