FROM node:20-alpine AS builder

WORKDIR /app

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

COPY . .

# 构建时注入后端地址（运行时通过 rewrites 代理，这里设为内部地址）
ARG BACKEND_URL=http://backend:8000
ENV BACKEND_URL=${BACKEND_URL}

RUN npm run build

# ---- Production image ----
FROM node:20-alpine AS runner

WORKDIR /app

ENV NODE_ENV=production

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

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

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