Docker setup for Ruby on Rails

Dockerfile

FROM atlashealth/ruby:2.1.2

ENV DEBIAN_FRONTEND noninteractive

# Install any dependencies needed by Rails
RUN apt-get update -q && \
    apt-get install -qy curl libpq-dev libqt4-dev xvfb imagemagick --no-install-recommends && \
    
    # install Node for asset minification
    curl -sL https://deb.nodesource.com/setup | bash - && \
    apt-get install -qy nodejs && \

    # cleanup
    apt-get clean && \
    cd /var/lib/apt/lists && rm -fr *Release* *Sources* *Packages* && \
    truncate -s 0 /var/log/*log

# https://github.com/docker/docker/issues/4032
ENV DEBIAN_FRONTEND newt

ENV GEM_HOME /ruby_gems/2.1
ENV PATH /ruby_gems/2.1/bin:$PATH

ADD . /app
WORKDIR /app

CMD ./script/start

Procfile

# optional - file only needed if using Foreman

web: bundle exec puma -p $PORT -C ./config/puma.rb

# other processes can be defined below
# worker: bundle exec sidekiq

start

#!/usr/bin/env bash

echo "Bundling gems"
bundle install --jobs 4 --retry 3

echo "Generating Spring binstubs"
bundle exec spring binstub --all

echo "Clearing logs"
bin/rake log:clear

echo "Setting up new db if one doesn't exist"
bin/rake db:version || { bundle exec rake db:setup; }

echo "Removing contents of tmp dirs"
bin/rake tmp:clear

echo "Starting app server"
bundle exec rails s -p 3000

# or use foreman
# gem install foreman
# foreman start