# builder 阶段：npm 依赖缓存跨构建持久化
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN apk add --no-cache python3 make g++
RUN --mount=type=cache,target=/root/.npm,id=assets-npm \
    npm ci
COPY . .
RUN npm run build

# runner 阶段：与 builder 保持一致（Alpine + musl），确保 better-sqlite3 等原生模块兼容
FROM node:20-alpine AS runner
RUN apk add --no-cache python3 make g++
WORKDIR /app
COPY --from=builder /app/package.json /app/package-lock.json ./
RUN npm install --omit=dev
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public
RUN mkdir -p /app/data /app/uploads
EXPOSE 3000
CMD ["node", "server.js"]