Dockerfile

FROM ruby:2.2
MAINTAINER kiki@codecons.com

# Install apt based dependencies required to run Rails as
# well as RubyGems. As the Ruby image itself is based on a
# Debian image, we use apt-get to install those.
RUN apt-get update && apt-get install -y \
  build-essential \
  nodejs

# Configure the main working directory. This is the base
# directory used in any further RUN, COPY, and ENTRYPOINT
# commands.
RUN mkdir /web
WORKDIR /web

# Copy the main application.
ADD ./web/Gemfile /web/Gemfile
ADD ./web/Gemfile.lock /web/Gemfile.lock

# Install needed gems
RUN bundle install --jobs 20 --retry 5

# Configure an entry point, so we don't need to specify
# "bundle exec" for each of our commands.
ENTRYPOINT ["bundle", "exec"]

# The main command to run when the container starts. Also
# tell the Rails dev server to bind to all interfaces by
# default.
CMD ["rails", "server", "-b", "0.0.0.0"]