Dockerfile

# Multi-stage build for Node.js application
FROM node:18-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci --only=production

# Copy application code
COPY src ./src
COPY ecosystem.json ./

# Production stage
FROM node:18-alpine

WORKDIR /app

# Create non-root user
RUN addgroup -g 1001 -S nodejs && \
    adduser -S nodejs -u 1001

# Copy from builder
COPY --from=builder --chown=nodejs:nodejs /app/node_modules ./node_modules
COPY --from=builder --chown=nodejs:nodejs /app/src ./src
COPY --from=builder --chown=nodejs:nodejs /app/ecosystem.json ./
COPY --from=builder --chown=nodejs:nodejs /app/package.json ./

# Switch to non-root user
USER nodejs

# Expose port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "const port = process.env.PORT || 8080; require('http').get('http://localhost:' + port + '/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

# Start server
CMD ["node", "src/server.new.js"]