# ─── Stage 1: Builder ───────────────────────────────────────────────────────
FROM node:20-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN apk add --no-cache libc6-compat
RUN npm ci && npm cache clean --force

FROM node:20-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
# Next.js compila aquí (esta es la parte que consume RAM)
RUN npm run build

# ─── Stage 2: Production Runner ────────────────────────────────────────────
FROM node:18-alpine AS runner
WORKDIR /app
ENV NODE_ENV production
ENV PORT=3020

COPY --from=builder /app/public ./public
COPY --from=builder /app/.next ./.next
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package.json ./package.json

EXPOSE 3020

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3020/api/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})" || exit 1

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