Dockerfile

FROM ruby:2.6.3-alpine

# Install system dependencies
RUN apk --update add \
      build-base \
      mariadb-dev \
      postgresql-dev \
      sqlite-dev \
      su-exec \
      tini && \
    gem update --system && \
    gem install bundler:1.17.2 && \
    rm -rf /var/cache/apk/*

# Create gemstash user
ENV GEMSTASH_USER="gemstash"
ENV GEMSTASH_HOME="/home/${GEMSTASH_USER}"
RUN addgroup -g "9999" "${GEMSTASH_USER}" && \
    adduser -S -D -u "9999" -G "${GEMSTASH_USER}" "${GEMSTASH_USER}"

# Install Gemstash
RUN mkdir -p "${GEMSTASH_HOME}/app"
WORKDIR "${GEMSTASH_HOME}/app"
COPY "app/" "${GEMSTASH_HOME}/app"
RUN bundle install --jobs 4 --retry 3

VOLUME "${GEMSTASH_HOME}/data"

EXPOSE 9292
USER ${GEMSTASH_USER}:${GEMSTASH_USER}
ENTRYPOINT ["tini", "--"]
CMD ["bundle", "exec", "gemstash", "start", "--no-daemonize", "--config-file=config.yml.erb"]