# ── Stage 1: build ──
FROM node:20-alpine AS builder
WORKDIR /app
COPY package.json ./
RUN npm install
COPY . .
RUN npm run build

# ── Stage 2: runtime ──
FROM node:20-alpine
WORKDIR /app
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public
ENV NODE_ENV=production PORT=3000
EXPOSE 3000
CMD ["node", "server.js"]
