ruby:2.4-alpine + rails 5.0.1

Dockerfile

FROM ruby:2.4-alpine

RUN apk --update add --virtual\
  build-dependencies build-base libev libev-dev postgresql-dev nodejs bash tzdata

ADD ./.gemrc /tmp
ADD ./Gemfile /tmp
ADD ./Gemfile.lock /tmp
WORKDIR /tmp

RUN bundle install --no-cache
 
ADD . /usr/src/loltime
RUN chown -R nobody:nogroup /usr/src/loltime
WORKDIR /usr/src/loltime

EXPOSE 3000

CMD bin/rails s -b 0.0.0.0