73 lines
2.5 KiB
Docker
73 lines
2.5 KiB
Docker
# syntax=docker/dockerfile:1
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# check=error=true
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# This Dockerfile is designed for production, not development. Use with Kamal or build'n'run by hand:
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# docker build -t puzzle_scoreboard .
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# docker run -d -p 80:80 -e RAILS_MASTER_KEY=<value from config/master.key> --name puzzle_scoreboard puzzle_scoreboard
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# For a containerized dev environment, see Dev Containers: https://guides.rubyonrails.org/getting_started_with_devcontainer.html
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# Make sure RUBY_VERSION matches the Ruby version in .ruby-version
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ARG RUBY_VERSION=3.4.2
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FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base
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# Rails app lives here
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WORKDIR /rails
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# Install base packages
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RUN apt-get update -qq && \
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apt-get install --no-install-recommends -y curl libjemalloc2 libvips sqlite3 && \
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rm -rf /var/lib/apt/lists /var/cache/apt/archives
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# Set production environment
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ENV RAILS_ENV="production" \
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BUNDLE_DEPLOYMENT="1" \
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BUNDLE_PATH="/usr/local/bundle" \
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BUNDLE_WITHOUT="development"
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# Throw-away build stage to reduce size of final image
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FROM base AS build
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# Install packages needed to build gems
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RUN apt-get update -qq && \
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apt-get install --no-install-recommends -y build-essential git libyaml-dev pkg-config && \
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rm -rf /var/lib/apt/lists /var/cache/apt/archives
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# Install application gems
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COPY Gemfile Gemfile.lock ./
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RUN bundle install && \
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rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
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bundle exec bootsnap precompile --gemfile
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# Copy application code
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COPY . .
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# Precompile bootsnap code for faster boot times
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RUN bundle exec bootsnap precompile app/ lib/
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# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
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RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
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# Final stage for app image
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FROM base
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# Copy built artifacts: gems, application
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COPY --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
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COPY --from=build /rails /rails
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# TODO: find how not to depend on this hack to include the compiled SCSS.
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RUN cp app/assets/builds/application.css `ls public/assets/application-*.css`
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# Run and own only the runtime files as a non-root user for security
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RUN groupadd --system --gid 1000 rails && \
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useradd rails --uid 1000 --gid 1000 --create-home --shell /bin/bash && \
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chown -R rails:rails db log storage tmp
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USER 1000:1000
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# Entrypoint prepares the database.
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ENTRYPOINT ["/rails/bin/docker-entrypoint"]
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# Start server via Thruster by default, this can be overwritten at runtime
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EXPOSE 80
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CMD ["./bin/thrust", "./bin/rails", "server"]
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