Shared Dockerfile

Dockerfile

FROM ruby:2.3-alpine

ARG BUNDLE_WITHOUT=test:development
ENV BUNDLE_WITHOUT ${BUNDLE_WITHOUT}

ADD Gemfile* /app/

RUN apk add --no-cache --virtual .build-deps build-base \
    && apk add --no-cache postgresql-dev tzdata \
    && cd /app; bundle install \
    && apk del .build-deps

ADD . /app
RUN chown -R nobody:nogroup /app
USER nobody

ARG RAILS_ENV=production
ENV RAILS_ENV ${RAILS_ENV}

WORKDIR /app

CMD ["bundle", "exec", "rails", "s", "-b", "0.0.0.0", "-p", "8080"]