Dockerfile.example

# Example Dockerfile for running Prescient gem applications
FROM ruby:3.4-alpine

# Install system dependencies
RUN apk add --no-cache \
    build-base \
    curl \
    git \
    postgresql-dev \
    tzdata

# Set working directory
WORKDIR /app

# Create non-root user
RUN addgroup -g 1000 -S appuser && \
    adduser -u 1000 -S appuser -G appuser

# Copy Gemfile and Gemfile.lock
COPY Gemfile* ./
COPY prescient.gemspec ./
COPY lib/prescient/version.rb ./lib/prescient/

# Install gems
RUN bundle config --global frozen 1 && \
    bundle install --jobs 4 --retry 3

# Copy application code
COPY . .

# Change ownership to appuser
RUN chown -R appuser:appuser /app

# Switch to non-root user
USER appuser

# Expose port (if running a web service)
EXPOSE 3000

# Default command
CMD ["bundle", "exec", "ruby", "examples/custom_contexts.rb"]