Dockerfile

# 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 my-app .
# docker run -d -p 80:80 -p 443:443 --name my-app -e RAILS_MASTER_KEY=<value from config/master.key> my-app

# 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=3.4.10
ARG PNPM_VERSION=11.21.0
FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base

# Rails app lives here
WORKDIR /enju

# Install base packages
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y curl libjemalloc2 libvips && \
    ln -s /usr/lib/$(uname -m)-linux-gnu/libjemalloc.so.2 /usr/local/lib/libjemalloc.so && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

# Set production environment variables and enable jemalloc for reduced memory usage and latency.
ENV RAILS_ENV="production" \
    BUNDLE_DEPLOYMENT="1" \
    BUNDLE_PATH="/usr/local/bundle" \
    BUNDLE_WITHOUT="development" \
    LD_PRELOAD="/usr/local/lib/libjemalloc.so"

# Throw-away build stage to reduce size of final image
FROM base AS build
ARG PNPM_VERSION

# Install packages needed to build gems
RUN apt-get update -qq && apt-get install --no-install-recommends -y curl gnupg && \
  mkdir -p /etc/apt/keyrings && \
  curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg && \
  curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor -o /etc/apt/keyrings/yarnkey.gpg && \
  echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_24.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list && \
  apt-get update -qq && apt-get install --no-install-recommends -y \
    build-essential git libpq-dev libvips pkg-config nodejs cmake \
    libzstd-dev libyaml-dev libcurl4-gnutls-dev && \
    npm install -g pnpm@${PNPM_VERSION}

# Install application gems
COPY Gemfile Gemfile.lock vendor ./

RUN bundle install && gem install foreman && \
    rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
    # -j 1 disable parallel compilation to avoid a QEMU bug: https://github.com/rails/bootsnap/issues/495
    bundle exec bootsnap precompile -j 1 --gemfile

# Install node modules
COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
RUN pnpm install --frozen-lockfile

# Copy application code
COPY . .

# Precompile bootsnap code for faster boot times.
# -j 1 disable parallel compilation to avoid a QEMU bug: https://github.com/rails/bootsnap/issues/495
RUN bundle exec bootsnap precompile -j 1 app/ lib/

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


# Final stage for app image
FROM base
ARG UID=1000
ARG GID=1000
ARG http_proxy
ARG https_proxy

# Install packages needed for deployment
RUN apt-get update -qq && apt-get install --no-install-recommends -y curl gnupg && \
  mkdir -p /etc/apt/keyrings && \
  curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg && \
  curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor -o /etc/apt/keyrings/yarnkey.gpg && \
  echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_24.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list && \
  apt-get update -qq && apt-get install --no-install-recommends -y \
    libvips postgresql-client-17 nodejs && \
    npm install -g pnpm@${PNPM_VERSION} && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

# Copy built artifacts: gems, application
COPY --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
COPY --from=build /enju /enju

# Run and own only the runtime files as a non-root user for security
RUN groupadd --gid ${GID} enju && \
    useradd enju --uid ${UID} --gid ${GID} --create-home --shell /bin/bash && \
    chown -R enju:enju db log storage tmp
USER enju:enju

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

# Start the server by default, this can be overwritten at runtime
EXPOSE 3000
CMD ["./bin/rails", "server"]