FROM node:20-alpine AS base
WORKDIR /app

FROM base AS deps
COPY backend/package*.json ./
RUN npm ci --only=production

FROM base AS builder
COPY backend/package*.json ./
RUN npm ci
COPY backend/ .

FROM base AS runner
ENV NODE_ENV=production
RUN addgroup --system --gid 1001 nodejs && \
    adduser --system --uid 1001 zufiti
COPY --from=deps /app/node_modules ./node_modules
COPY --from=builder /app .
RUN mkdir -p uploads logs && chown -R zufiti:nodejs uploads logs
USER zufiti
EXPOSE 3000
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
  CMD wget -qO- http://localhost:3000/health || exit 1
CMD ["node", "server.js"]