Dockerfile.multistaging

# Build stage
FROM ruby:3.1.4 AS build
WORKDIR /app

# Install system dependencies and cleanup
RUN apt-get update -qq && \
    apt-get install -y build-essential libvips bash bash-completion libffi-dev tzdata postgresql nodejs npm yarn && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/* /usr/share/doc /usr/share/man

# Copy Gemfile and Gemfile.lock to the build stage
COPY Gemfile Gemfile.lock ./

# Install gems (dependencies) for the application
RUN bundle install

# Copy the rest of the application source code
COPY . .

# Set production environment variables
ENV RAILS_LOG_TO_STDOUT="1" \
    RAILS_SERVE_STATIC_FILES="true" \
    RAILS_ENV="production" \
    BUNDLE_WITHOUT="development"

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

# Build the application (you may customize this step)
RUN bundle exec rake assets:precompile 
    
# Runtime stage
FROM ruby:3.1.4-slim
WORKDIR /app

# Install the PostgreSQL Client in the Runtime Stage
RUN apt-get update -qq && \
    apt-get install -y --no-install-recommends \
    libpq-dev && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/* /usr/share/doc /usr/share/man

# Set production environment variables
ENV RAILS_LOG_TO_STDOUT="1" \
    RAILS_SERVE_STATIC_FILES="true" \
    RAILS_ENV="production" \
    BUNDLE_WITHOUT="development"

# Copy installed dependiencies gem
COPY --from=build /usr/local/bundle /usr/local/bundle   

# Copy all of the application's assets to the production image (assets:precompile)
COPY --from=build app/public/assets /app/public/assets

# Copy bootsnap code for faster boot times
COPY --from=build app/tmp/cache/bootsnap /lib/

COPY . .
EXPOSE 3000

COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh

ENTRYPOINT ["/usr/bin/entrypoint.sh"]

# Start your application (adjust the command as needed)
CMD ["rails", "server", "-b", "0.0.0.0"]