Bring Dockerfile from Fizzy and configure the deploy setup to use it

saas/Dockerfile

@@ -0,0 +1,77 @@
+# Make sure RUBY_VERSION matches the Ruby version in .ruby-version
+ARG RUBY_VERSION=3.4.7
+FROM registry.docker.com/library/ruby:$RUBY_VERSION-slim AS base
+
+# Rails app lives here
+WORKDIR /rails
+
+# Set production environment
+ENV RAILS_ENV="production" \
+    BUNDLE_DEPLOYMENT="1" \
+    BUNDLE_PATH="/usr/local/bundle" \
+    BUNDLE_WITHOUT="development"
+
+
+# Throw-away build stage to reduce size of final image
+FROM base AS build
+
+# Install packages needed to build gems
+RUN apt-get update -qq && \
+    apt-get install -y --no-install-recommends -y build-essential pkg-config git libvips libyaml-dev libssl-dev && \
+    rm -rf /var/lib/apt/lists /var/cache/apt/archives
+
+# Install application gems
+COPY Gemfile Gemfile.lock .ruby-version ./
+COPY lib/fizzy.rb ./lib/fizzy.rb
+COPY gems ./gems/
+RUN --mount=type=secret,id=GITHUB_TOKEN --mount=type=cache,id=fizzy-permabundle-${RUBY_VERSION},sharing=locked,target=/permabundle \
+    gem install bundler && \
+    BUNDLE_PATH=/permabundle BUNDLE_GITHUB__COM="$(cat /run/secrets/GITHUB_TOKEN):x-oauth-basic" bundle install && \
+    cp -a /permabundle/. "$BUNDLE_PATH"/ && \
+    bundle clean --force && \
+    rm -rf "$BUNDLE_PATH"/ruby/*/bundler/gems/*/.git && \
+    find "$BUNDLE_PATH" -type f \( -name '*.gem' -o -iname '*.a' -o -iname '*.o' -o -iname '*.h' -o -iname '*.c' -o -iname '*.hpp' -o -iname '*.cpp' \) -delete && \
+    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
+
+# Install packages needed for deployment
+RUN apt-get update -qq && \
+    apt-get install --no-install-recommends -y curl libsqlite3-0 libvips build-essential ffmpeg groff libreoffice-writer libreoffice-impress libreoffice-calc mupdf-tools sqlite3 libjemalloc-dev && \
+    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
+
+# Run and own only the runtime files as a non-root user for security
+RUN useradd rails --create-home --shell /bin/bash && \
+    chown -R rails:rails db log storage tmp
+USER rails:rails
+
+# Entrypoint prepares the database.
+ENTRYPOINT ["/rails/bin/docker-entrypoint"]
+
+# Ruby GC tuning values pulled from Autotuner recommendations
+ENV RUBY_GC_HEAP_0_INIT_SLOTS=692636 \
+    RUBY_GC_HEAP_1_INIT_SLOTS=175943 \
+    RUBY_GC_HEAP_2_INIT_SLOTS=148807 \
+    RUBY_GC_HEAP_3_INIT_SLOTS=9169 \
+    RUBY_GC_HEAP_4_INIT_SLOTS=3054 \
+    RUBY_GC_MALLOC_LIMIT=33554432 \
+    RUBY_GC_MALLOC_LIMIT_MAX=67108864 \
+    LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.2
+
+# Start the server by default, this can be overwritten at runtime
+EXPOSE 80 443 9394
+CMD ["./bin/thrust", "./bin/rails", "server"]

saas/config/deploy.yml

@@ -21,6 +21,7 @@ registry:
 
 builder:
   arch: amd64
+  dockerfile: <%= File.join(Gem::Specification.find_by_name("fizzy-saas").gem_dir, "Dockerfile") %>
   secrets:
     - GITHUB_TOKEN
   remote: ssh://app@docker-builder-102