# --- 빌드 스테이지 ---
FROM node:20-alpine AS builder
WORKDIR /app

COPY package.json package-lock.json ./
RUN npm ci

COPY . .
RUN npm run build

# --- 실행 스테이지 (standalone) ---
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV PORT=3000
ENV HOSTNAME=0.0.0.0

RUN addgroup -S nodejs && adduser -S nextjs -G nodejs

COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public

USER nextjs
EXPOSE 3000

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