Dockerfile
ARG RUBY_VERSION=3.1.4
FROM public.ecr.aws/docker/library/ruby:$RUBY_VERSION-slim as base
WORKDIR /rails
RUN apt-get update -qq && \
apt-get install -y build-essential libcurl4-openssl-dev curl && \
apt-get clean && \
rm -rf /var/lib/apt/lists/*
ENV RAILS_ENV="production" \
BUNDLE_DEPLOYMENT="1" \
BUNDLE_PATH="/usr/local/bundle"
FROM base as build
RUN gem install bundler -v 2.4.7
COPY Gemfile Gemfile.lock ./
RUN bundle install && \
rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
COPY . .
FROM base
COPY --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
COPY --from=build /rails /rails
RUN groupadd --system --gid 1000 rails && \
useradd --uid 1000 --gid 1000 --create-home --shell /bin/bash rails
RUN mkdir -p /rails/log /rails/tmp && \
chown -R rails:rails /rails/log /rails/tmp
RUN bin/secure_docker
USER 1000:1000
EXPOSE 3300
CMD ["bundle", "exec", "rails", "server", "-b", "0.0.0.0", "-p", "3300"]