# 构建上下文：frontend/。standalone 产物，运行时不含完整 node_modules。
# syntax=docker/dockerfile:1

FROM node:22-bookworm-slim AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci --no-audit --no-fund

FROM node:22-bookworm-slim AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN mkdir -p public
ARG VERSION=dev
ARG BACKEND_URL=http://api:3001
ENV NEXT_TELEMETRY_DISABLED=1 \
    NODE_ENV=production \
    NEXT_PUBLIC_APP_VERSION=${VERSION} \
    BACKEND_URL=${BACKEND_URL}
RUN npm run build

FROM node:22-bookworm-slim AS runner
WORKDIR /app
ENV NODE_ENV=production \
    PORT=3000 \
    HOSTNAME=0.0.0.0 \
    NEXT_TELEMETRY_DISABLED=1 \
    BACKEND_URL=http://api:3001
RUN mkdir -p public .next && chown -R node:node /app
COPY --from=builder --chown=node:node /app/public ./public
COPY --from=builder --chown=node:node /app/.next/standalone ./
COPY --from=builder --chown=node:node /app/.next/static ./.next/static
USER node
EXPOSE 3000
HEALTHCHECK --interval=10s --timeout=5s --start-period=30s --retries=5 \
    CMD node -e "fetch('http://127.0.0.1:3000/healthz').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"
CMD ["node", "server.js"]