docker-compose.yml

web:
  build: .
  command: bin/puma -C config/puma.rb
  ports:
    - 80:5000
    - 443:5000
  volumes:
    - .:/app

worker:
  build: .
  command: bin/sidekiq
  volumes:
    - .:/app

Dockerfile

FROM ruby:2.3-alpine

RUN apk add --update \
 build-base \
 git \
 libxml2-dev \
 libxslt-dev \
 tzdata \
 rm -rf /var/cache/apk/*; \
 gem update --system;

RUN bundle config build.nokogiri --use-system-libraries

WORKDIR /app

COPY Gemfile /app/Gemfile
COPY Gemfile.lock /app/Gemfile.lock
RUN bundle install --without development test

COPY . /app

CMD ["bin/puma", "-C", "config/puma.rb"]

Dockerfile-princexml

FROM ruby:2.3

ENV PRINCEXML_VESION 10r7-1

RUN apt-get update; \
 apt-get install -y --no-install-recommends \
 postgresql-client \
 nodejs \
 libc6 \
 libcurl3 \
 libfontconfig1 \
 libfreetype6 \
 libgif4 \
 libjpeg62-turbo \
 libpng12-0 \
 libssl1.0.0 \
 libtiff5 \
 libxml2 \
 zlib1g; \
 \
 curl -O http://www.princexml.com/download/prince_${PRINCEXML_VESION}_debian8.0_amd64.deb;\
 dpkg -i prince_${PRINCEXML_VESION}_debian8.0_amd64.deb; \
 rm -rf prince_${PRINCEXML_VESION}_debian8.0_amd64.deb; \
 \
 rm -rf /var/lib/apt/lists/*;

RUN bundle config build.nokogiri --use-system-libraries

WORKDIR /app

COPY Gemfile /app/Gemfile
COPY Gemfile.lock /app/Gemfile.lock
RUN bundle install --without development test

COPY . /app
RUN rake assets:precompile

CMD ["bin/puma", "-C", "config/puma.rb"]