Dockerfile

# Make sure it matches the Ruby version in .ruby-version and Gemfile
ARG RUBY_VERSION=3.1.2
FROM ruby:$RUBY_VERSION

# Install libvips for Active Storage preview support
RUN apt-get update -qq && \
    apt-get install -y build-essential libvips bash bash-completion libffi-dev tzdata postgresql nodejs npm yarn && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/* /usr/share/doc /usr/share/man

# Install specific version of Node.js
RUN curl -sL https://deb.nodesource.com/setup_14.x | bash -
RUN apt-get install -y nodejs

# install yarn
RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
RUN apt-get update -qq && apt-get install -y yarn

# Rails app lives here
WORKDIR /rails

# Set production environment
ENV RAILS_LOG_TO_STDOUT="1" \
    RAILS_SERVE_STATIC_FILES="true" \
    RAILS_ENV="production" \
    BUNDLE_WITHOUT="development"

# Install application gems
COPY Gemfile Gemfile.lock ./
RUN bundle install

# Copy application code
COPY . .

RUN chmod +x /rails/bin/docker-entrypoint

# Precompile bootsnap code for faster boot times
RUN bundle exec bootsnap precompile --gemfile app/ lib/

# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
RUN SECRET_KEY_BASE_DUMMY=1 bundle exec rails assets:precompile

# Entrypoint prepares the database.
ENTRYPOINT ["/rails/bin/docker-entrypoint"]

# Start the server by default, this can be overwritten at runtime
EXPOSE 3000
CMD ["bundle", "exec", "puma", "-e", "production", "-C", "config/puma.rb"]