Jason Jordan
68 lines
1.9 KiB
Docker
68 lines
1.9 KiB
Docker
# syntax = docker/dockerfile:1
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# 1. Base Stage: Common dependencies
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ARG RUBY_VERSION=3.3.1
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FROM ruby:$RUBY_VERSION-slim as base
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WORKDIR /rails
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ENV RAILS_ENV="production" \
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BUNDLE_DEPLOYMENT="1" \
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BUNDLE_PATH="/usr/local/bundle" \
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BUNDLE_WITHOUT="development:test"
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# Install base packages (libvips for Active Storage, curl for healthchecks)
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RUN apt-get update -qq && \
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apt-get install --no-install-recommends -y \
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build-essential \
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curl \
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git \
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libvips \
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freetds-bin \
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freetds-dev \
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libjemalloc2 \
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ruby-dev \
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dos2unix && \
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rm -rf /var/lib/apt/lists /var/cache/apt/archives
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# 2. Build Stage: Gems and Assets
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FROM base as build
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# Install packages needed to build gems and precompile assets
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RUN apt-get update -qq && \
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apt-get install --no-install-recommends -y build-essential pkg-config less && \
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rm -rf /var/lib/apt/lists /var/cache/apt/archives
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# Install application gems
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RUN bundle config set --local frozen false
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COPY Gemfile Gemfile.lock ./
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RUN bundle install && \
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rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
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bundle exec bootsnap precompile --gemfile
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# Copy application code
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COPY . .
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RUN bundle exec bootsnap precompile app/
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# 3. Final Stage: Lean Runtime
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FROM base
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# Copy built artifacts: gems and precompiled assets
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# COPY --from=build /rails/public /rails/public
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# COPY --from=build /rails/app/javascript /rails/app/javascript
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# COPY --from=build /rails/config/importmap.rb /rails/config/importmap.rb
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COPY --from=build /usr/local/bundle /usr/local/bundle
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COPY --from=build /rails /rails
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# Run as a non-privileged user for security
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RUN useradd -ms /bin/bash rails
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RUN chown -R rails:rails /rails
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USER rails:rails
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# Entrypoint prepares the database.
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ENTRYPOINT ["/rails/bin/docker-entrypoint"]
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# Start the server
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EXPOSE 3005
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CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]
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