# syntax=docker/dockerfile:1 # check=error=true # This Dockerfile is designed for production, not development. Use with Kamal or build'n'run by hand: # docker build -t <%= app_name %> . # docker run -d -p 80:<%= skip_thruster? ? 3000 : 80 %> -e RAILS_MASTER_KEY= --name <%= app_name %> <%= app_name %> # For a containerized dev environment, see Dev Containers: https://guides.rubyonrails.org/getting_started_with_devcontainer.html # Make sure RUBY_VERSION matches the Ruby version in .ruby-version ARG RUBY_VERSION=<%= Gem.ruby_version %> FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base # Rails app lives here WORKDIR /rails # Install base packages RUN apt-get update -qq && \ apt-get install --no-install-recommends -y <%= dockerfile_base_packages.join(" ") %> && \ rm -rf /var/lib/apt/lists /var/cache/apt/archives # Set production environment ENV RAILS_ENV="production" \ BUNDLE_DEPLOYMENT="1" \ BUNDLE_PATH="/usr/local/bundle" \ BUNDLE_WITHOUT="development" # Throw-away build stage to reduce size of final image FROM base AS build # Install packages needed to build gems<%= using_node? ? " and node modules" : "" %> RUN apt-get update -qq && \ apt-get install --no-install-recommends -y <%= dockerfile_build_packages.join(" ") %> && \ rm -rf /var/lib/apt/lists /var/cache/apt/archives <% if using_node? -%> # Install JavaScript dependencies ARG NODE_VERSION=<%= node_version %> ARG YARN_VERSION=<%= dockerfile_yarn_version %> ENV PATH=/usr/local/node/bin:$PATH RUN curl -sL https://github.com/nodenv/node-build/archive/master.tar.gz | tar xz -C /tmp/ && \ /tmp/node-build-master/bin/node-build "${NODE_VERSION}" /usr/local/node && \ npm install -g yarn@$YARN_VERSION && \ rm -rf /tmp/node-build-master <% end -%> <% if using_bun? -%> ENV BUN_INSTALL=/usr/local/bun ENV PATH=/usr/local/bun/bin:$PATH ARG BUN_VERSION=<%= dockerfile_bun_version %> RUN curl -fsSL https://bun.sh/install | bash -s -- "bun-v${BUN_VERSION}" <% end -%> # Install application gems COPY Gemfile Gemfile.lock ./ RUN bundle install && \ rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git<% if depend_on_bootsnap? -%> && \ bundle exec bootsnap precompile --gemfile<% end %> <% if using_node? -%> # Install node modules COPY package.json yarn.lock ./ RUN yarn install --frozen-lockfile <% end -%> <% if using_bun? -%> # Install node modules COPY package.json bun.lockb ./ RUN bun install --frozen-lockfile <% end -%> # Copy application code COPY . . <% if depend_on_bootsnap? -%> # Precompile bootsnap code for faster boot times RUN bundle exec bootsnap precompile app/ lib/ <% end -%> <% unless dockerfile_binfile_fixups.empty? -%> # Adjust binfiles to be executable on Linux <%= "RUN " + dockerfile_binfile_fixups.join(" && \\\n ") %> <% end -%> <% unless options.api? || skip_asset_pipeline? -%> # Precompiling assets for production without requiring secret RAILS_MASTER_KEY RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile <% end -%> <% if using_node? -%> RUN rm -rf node_modules <% end %> # Final stage for app image FROM base # Copy built artifacts: gems, application COPY --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}" COPY --from=build /rails /rails # Run and own only the runtime files as a non-root user for security RUN groupadd --system --gid 1000 rails && \ useradd rails --uid 1000 --gid 1000 --create-home --shell /bin/bash && \ chown -R rails:rails <%= dockerfile_chown_directories.join(" ") %> USER 1000:1000 # Entrypoint prepares the database. ENTRYPOINT ["/rails/bin/docker-entrypoint"] <% if skip_thruster? -%> # Start the server by default, this can be overwritten at runtime EXPOSE 3000 CMD ["./bin/rails", "server"] <% else -%> # Start server via Thruster by default, this can be overwritten at runtime EXPOSE 80 CMD ["./bin/thrust", "./bin/rails", "server"] <% end -%>