Files
once-campfire/Dockerfile
Alexander Nicholson 4584443+DragonStuff@users.noreply.github.com 8608ba2520 chore: use build arg for image description
2025-09-05 09:56:42 +02:00

80 lines
2.3 KiB
Docker

# syntax = docker/dockerfile:1
# Make sure it matches the Ruby version in .ruby-version and Gemfile
ARG RUBY_VERSION=3.4.5
FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base
# Rails app lives here
WORKDIR /rails
# Install base packages
RUN apt-get update -qq && \
apt-get install --no-install-recommends -y curl libsqlite3-0 libvips libjemalloc2 ffmpeg redis && \
ln -s /usr/lib/$(uname -m)-linux-gnu/libjemalloc.so.2 /usr/local/lib/libjemalloc.so && \
rm -rf /var/lib/apt/lists /var/cache/apt/archive
# Set production environment
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
# Install packages need to build gems
RUN apt-get update -qq && \
apt-get install -y build-essential git pkg-config libyaml-dev && \
rm -rf /var/lib/apt/lists /var/cache/apt/archives
# Install application gems
COPY Gemfile Gemfile.lock vendor ./
RUN bundle install && \
rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
# Copy application code
COPY . .
# 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
# Image metadata
ARG OCI_DESCRIPTION
LABEL org.opencontainers.image.description="${OCI_DESCRIPTION}"
ARG OCI_SOURCE
LABEL org.opencontainers.image.source="${OCI_SOURCE}"
LABEL org.opencontainers.image.licenses="MIT"
# 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
USER 1000:1000
# Configure environment defaults
ENV HTTP_IDLE_TIMEOUT=60
ENV HTTP_READ_TIMEOUT=300
ENV HTTP_WRITE_TIMEOUT=300
# Copy built artifacts: gems, application
COPY --from=build --chown=rails:rails /usr/local/bundle /usr/local/bundle
COPY --from=build --chown=rails:rails /rails /rails
# Set version and revision
ARG APP_VERSION
ENV APP_VERSION=$APP_VERSION
ARG GIT_REVISION
ENV GIT_REVISION=$GIT_REVISION
# Expose ports for HTTP and HTTPS
EXPOSE 80 443
# Start the server by default, this can be overwritten at runtime
CMD ["bin/boot"]