Dockerfile to ruby 2.1.2

Dockerfile

# The container includes:
#
# azukiapp/ruby:
# * MRI Ruby 2.1.4
# * Bundler
# * Image Magick
#

FROM azukiapp/node
MAINTAINER Azuki <[email protected]>

ENV RUBY_MAJOR 2.1
ENV RUBY_VERSION 2.1.2

# Set $PATH so that non-login shells will see the Ruby binaries
ENV PATH $PATH:/opt/rubies/ruby-$RUBY_VERSION/bin

# Install MRI Ruby $RUBY_VERSION
RUN curl -O http://ftp.ruby-lang.org/pub/ruby/$RUBY_MAJOR/ruby-$RUBY_VERSION.tar.gz && \
    tar -zxvf ruby-$RUBY_VERSION.tar.gz && \
    cd ruby-$RUBY_VERSION && \
    ./configure --disable-install-doc && \
    make && \
    make install && \
    cd .. && \
    rm -r ruby-$RUBY_VERSION ruby-$RUBY_VERSION.tar.gz && \
    echo 'gem: --no-document' > /usr/local/etc/gemrc

# ==============================================================================
# Rubygems and Bundler
# ==============================================================================

ENV RUBYGEMS_MAJOR 2.3
ENV RUBYGEMS_VERSION 2.3.0

# Install rubygems and bundler
ADD http://production.cf.rubygems.org/rubygems/rubygems-$RUBYGEMS_VERSION.tgz /tmp/
RUN cd /tmp && \
    tar -zxf /tmp/rubygems-$RUBYGEMS_VERSION.tgz && \
    cd /tmp/rubygems-$RUBYGEMS_VERSION && \
    ruby setup.rb && \
    /bin/bash -l -c 'gem install bundler --no-rdoc --no-ri' && \
    echo "gem: --no-ri --no-rdoc" > ~/.gemrc

# Define working directory
WORKDIR /app

# Set bash as a default process
CMD ["bash"]