Dockerfile

# syntax = docker/dockerfile:1

# Make sure RUBY_VERSION matches the Ruby version in .ruby-version and Gemfile
ARG RUBY_VERSION=3.3.5
FROM registry.docker.com/library/ruby:$RUBY_VERSION-slim

# Rails app lives here
WORKDIR /rails

# Set production environment
# ENV RAILS_ENV="production" \
#     BUNDLE_DEPLOYMENT="1" \
#     BUNDLE_PATH="/usr/local/bundle" \
#     BUNDLE_WITHOUT="development"

# Install packages needed to build gems
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y build-essential git libvips pkg-config

# 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 . /rails

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

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

# Install packages needed for deployment
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y curl libsqlite3-0 libvips && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

# Start the server by default, this can be overwritten at runtime
EXPOSE 80
CMD ["./bin/rails", "server", "-p", "80", "-b", "0.0.0.0"]