FROM node:23-alpine

# Switch to non-root user
USER node

COPY --chown=node:node package*.json ./

# Install dependencies
RUN npm install

# Copy application files with correct ownership
COPY --chown=node:node main.js util.js worker.js ./

# Create logs directory with correct permissions
RUN mkdir -p app/logs && chown -R node:node app

# Expose logs directory as a volume
VOLUME ["/home/node/app/logs"]

# Use an environment variable for thread count (default to 0 to use auto)
ENV THREAD_COUNT=0

# Run the application - using JSON array format
CMD ["sh", "-c", "node main.js ${THREAD_COUNT}"]