# syntax = docker/dockerfile:1 # Make sure RUBY_VERSION matches the Ruby version in .ruby-version and Gemfile ARG RUBY_VERSION=3.4.1 FROM registry.docker.com/library/ruby:$RUBY_VERSION-slim as base # Rails app lives here WORKDIR /rails RUN apt-get update && apt-get install -y nodejs FROM base as build # Install packages needed to build gems RUN apt-get update -qq && \ apt-get install --no-install-recommends -y build-essential git libpq-dev libvips pkg-config libyaml-dev # Install application gems COPY Gemfile Gemfile.lock ./ RUN bundle install # Copy application code COPY . . # Final stage for app image FROM base # Install packages needed for deployment RUN apt-get update -qq && \ apt-get install --no-install-recommends -y curl libvips postgresql-client && \ rm -rf /var/lib/apt/lists /var/cache/apt/archives # Copy built artifacts: gems, application COPY --from=build /usr/local/bundle /usr/local/bundle COPY --from=build /rails /rails # Entrypoint prepares the database. ENTRYPOINT ["/rails/bin/docker-entrypoint"] # Start the server by default, this can be overwritten at runtime EXPOSE 3000 CMD ["./bin/rails", "server", "--binding=0.0.0.0"]