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Dockerfile
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Dockerfile
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FROM ruby:2.3.2
MAINTAINER [email protected]
# 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 \
locales
# Use en_US.UTF-8 as our locale
RUN locale-gen en_US.UTF-8
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8
# Configure the main working directory. This is the base
# directory used in any further RUN, COPY, and ENTRYPOINT
# commands.
RUN mkdir -p /app
WORKDIR /app
# Copy the Gemfile as well as the Gemfile.lock and install
# the RubyGems. This is a separate step so the dependencies
# will be cached unless changes to one of those two files
# are made.
COPY Gemfile /app/Gemfile
RUN bundle install --jobs 20 --retry 5
# Copy the main application.
COPY . /app
# Expose port 3000 to the Docker host, so we can access it
# from the outside.
EXPOSE 3000