FROM node:20-alpine

# Set working directory
WORKDIR /app

# Copy package files
COPY package*.json ./

# Build-time flag to include dev dependencies for local images
ARG NODE_ENV=production
ENV NODE_ENV=${NODE_ENV}

# Install dependencies (omit dev deps for production images)
RUN if [ "$NODE_ENV" = "development" ]; then \
      npm ci --include=dev --silent; \
    else \
      npm ci --omit=dev --silent; \
    fi && \
    npm cache clean --force

# Copy source code
COPY . .

# Expose port
EXPOSE 5000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
  CMD node healthcheck.js

# Start the application
CMD ["npm", "start"]