Dockerfile

# syntax = docker/dockerfile:1

ARG RUBY_VERSION=3.3.4
FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base

LABEL service="tinyapi"

WORKDIR /rails

RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y curl libjemalloc2 libvips sqlite3 nodejs npm && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

ENV RAILS_ENV="production" \
    BUNDLE_PATH="/usr/local/bundle" \
    BUNDLE_WITHOUT="development:test"

FROM base AS build

RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y build-essential git pkg-config && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

COPY Gemfile Gemfile.lock ./
RUN bundle config set --local deployment 'true' && \
    bundle install --jobs 4 --retry 3 && \
    rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
    bundle exec bootsnap precompile --gemfile

COPY . .

RUN bundle exec bootsnap precompile app/ lib/

# Precompile assets
RUN SECRET_KEY_BASE_DUMMY=1 bundle exec rails assets:precompile

RUN chmod +x bin/* && \
    sed -i "s/\r$//g" bin/* && \
    sed -i 's/ruby\.exe$/ruby/' bin/*

FROM base

COPY --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
COPY --from=build /rails /rails

RUN mkdir -p tmp/pids tmp/sockets log storage public/assets && \
    groupadd --system --gid 1000 rails && \
    useradd rails --uid 1000 --gid 1000 --create-home --shell /bin/bash && \
    chown -R rails:rails /rails && \
    chmod -R 755 /rails/public/assets

USER rails

ENTRYPOINT ["/rails/bin/docker-entrypoint"]

EXPOSE 3000
CMD ["./bin/rails", "server"]