Dockerfile

# syntax=docker/dockerfile:1
# check=error=true;skip=SecretsUsedInArgOrEnv

# This Dockerfile is designed for production, not development. Use with Kamal or build'n'run by hand:
# docker build -t realphotos_marketplace .
# docker run -d -p 80:80 -e RAILS_MASTER_KEY=<value from config/master.key> --name realphotos_marketplace realphotos_marketplace

# 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=4.0.1
FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base

# Rails app lives here
WORKDIR /rails

# Install base packages
# curl        - downloading files at runtime (e.g. health checks)
# libjemalloc2 - memory allocator with lower fragmentation and better performance
# libvips     - image processing backend for Active Storage variants
# postgresql-client - psql CLI for database management and health checks
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y curl libjemalloc2 libvips postgresql-client && \
    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 and frontend assets
# build-essential - C/C++ compiler and make for compiling native gem extensions
# git            - required by Bundler to install gems from git sources
# pkg-config     - helps native extensions locate system libraries during compilation
# libpq-dev      - PostgreSQL headers required to compile the pg gem
# libyaml-dev    - YAML headers required to compile the psych gem (Ruby's YAML parser)
# automake, libtool, libffi-dev, libssl-dev, libgmp-dev - required by rbsecp256k1 (eth gem dependency)
# liborc-0.4-dev - ORC (SIMD optimization) headers required by libvips build pipeline
# libglib2.0-dev - GLib headers required by libvips
# nodejs / npm   - JavaScript runtime needed to run Vite for asset compilation
# corepack       - enables Yarn 4 (defined in packageManager field) via Node's Corepack
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y build-essential git pkg-config libpq-dev libyaml-dev automake libtool libffi-dev libssl-dev libgmp-dev liborc-0.4-dev libglib2.0-dev nodejs npm && \
    corepack enable && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

# Install application gems
COPY Gemfile Gemfile.lock ./
RUN bundle install && \
    rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
    bundle exec bootsnap precompile --gemfile

# Copy application code
COPY . .

# Precompile bootsnap code for faster boot times
RUN bundle exec bootsnap precompile app/ lib/

# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile




# Final stage for app image
FROM base

ARG MASTER_KEY
ENV RAILS_MASTER_KEY=${MASTER_KEY}

# 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 db log storage tmp
USER 1000:1000

# Entrypoint prepares the database.
ENTRYPOINT ["/rails/bin/docker-entrypoint"]

# Start server via Thruster by default, this can be overwritten at runtime
EXPOSE 80
CMD ["./bin/thrust", "./bin/rails", "server"]