部署

# syntax=docker.io/docker/dockerfile:1

FROM node:24-alpine AS base

# 僅在需要時安裝相依套件
FROM base AS deps
# 請參閱 https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine 以了解為何可能需要 libc6-compat。
RUN apk add --no-cache libc6-compat
WORKDIR /app

# 依據偏好的套件管理器安裝相依套件
COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* .npmrc* ./
RUN \
  if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
  elif [ -f package-lock.json ]; then npm ci; \
  elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm i --frozen-lockfile; \
  else echo "Lockfile not found." && exit 1; \
  fi


# 僅在需要時重新建置原始碼
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Next.js 會收集完全匿名的一般使用情況遙測資料。
# 詳細資訊請參閱：https://nextjs.org/telemetry
# 若要在建置期間停用遙測，請取消註解下一行。
# ENV NEXT_TELEMETRY_DISABLED=1

RUN \
  if [ -f yarn.lock ]; then yarn run build; \
  elif [ -f package-lock.json ]; then npm run build; \
  elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm run build; \
  else echo "Lockfile not found." && exit 1; \
  fi

# 正式環境映像檔：複製所有檔案並執行 next
FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production
# 若要在執行階段停用遙測，請取消註解下一行。
# ENV NEXT_TELEMETRY_DISABLED=1

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

COPY --from=builder /app/public ./public

# 自動利用輸出追蹤來縮減映像檔大小
# https://nextjs.org/docs/advanced-features/output-file-tracing
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

ENV PORT=3000

# server.js 由 next build 從 standalone 輸出產生
# https://nextjs.org/docs/pages/api-reference/config/next-config-js/output
ENV HOSTNAME="0.0.0.0"
CMD ["node", "server.js"]