Dockerfile

FROM ruby:3.3.4-slim-bookworm AS builder

ENV RAILS_ENV=production

# Install dependencies
RUN apt-get update -qq && apt-get install -y build-essential apt-utils git cron curl nodejs

# Add crontab file in the cron directory
COPY ./config/arclight-cron /etc/cron.d/arclight-cron

# Give execution rights on the cron job
RUN chmod 0644 /etc/cron.d/arclight-cron

# Apply cron job to clean up the db
RUN crontab /etc/cron.d/arclight-cron

# Install gems
WORKDIR /app
COPY Gemfile* ./
RUN bundle install

# Copy application code
COPY . /app

# Use build secret for master key
RUN --mount=type=secret,id=master_key \
    mkdir -p /app/config && \
    cp /run/secrets/master_key /app/config/master.key && \
    echo "Master key copied:" && cat /app/config/master.key && \
    echo "Running asset precompile..." && \
    bundle check || bundle install &&\
    RAILS_ENV=production MASTER_KEY=$(cat /app/config/master.key) bundle exec rails assets:precompile && \
    echo "Cleaning up..." && \
    rm /app/config/master.key

# Final image
FROM ruby:3.3.4-slim-bookworm

# Install dependencies
RUN apt-get update -qq && apt-get install -y build-essential apt-utils git cron curl nodejs

# Copy application code from the builder stage and install gems
COPY --from=builder /app /app
WORKDIR /app
RUN bundle install

# Removes the traject config as it interferes with puma for some reason
RUN rm -rf /app/lib/arclight/traject

# Expose port 3000
ARG DEFAULT_PORT 3000
EXPOSE ${DEFAULT_PORT}

# Copy the entrypoint script
COPY entrypoint.sh /usr/bin/entrypoint.sh
RUN chmod +x /usr/bin/entrypoint.sh

# Start cron and Rails server
CMD ["sh", "-c", "cron && /usr/bin/entrypoint.sh"]