Dockerfile

# ================================
# Next.js 生产最优模板
# 最终镜像 130~160MB
# ================================

# 公共 base（只拉一次镜像，所有阶段共享）
FROM node:22-alpine AS base
RUN apk add --no-cache libc6-compat
# pnpm 只装一次，所有阶段都能用
RUN corepack enable && corepack prepare pnpm@latest --activate

# 1. 只安装生产依赖（缓存命中率极高）
FROM base AS deps
WORKDIR /app
COPY package.json pnpm-lock.yaml* ./
RUN pnpm install --frozen-lockfile --prod

# 2. 构建阶段
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN pnpm build

# 3. 最终生产镜像
FROM base AS runner
WORKDIR /app

# 非 root 用户（安全）
RUN addgroup -S -g 1001 nodejs
RUN adduser -S -u 1001 nextjs

# 只复制独立运行所需的文件（Next.js 官方推荐的最小模式）
COPY --from=builder /app/next.config.mjs .* 
COPY --from=builder /app/package.json ./
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public

USER nextjs
EXPOSE 3000
ENV PORT=3000 NODE_ENV=production

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