FROM node:20-slim AS base

WORKDIR /app

# Install production dependencies only
COPY package.json package-lock.json* ./
RUN npm ci --production 2>/dev/null || npm install --production

# Copy application code
COPY src/ ./src/

ENV NODE_ENV=production
ENV PORT=3000

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD node -e "const http = require('http'); http.get('http://localhost:3000/api/health', (r) => process.exit(r.statusCode === 200 ? 0 : 1)).on('error', () => process.exit(1));"

USER node

CMD ["node", "src/server.js"]