update

Dockerfile

@@ -23,9 +23,15 @@ RUN npm ci
 COPY . .
 RUN npm run build
 
-# ---- 静态托管阶段 ----
-FROM nginx:alpine
-COPY --from=build /app/dist /usr/share/nginx/html
+# ---- 运行阶段 ----
+# 前端以 @astrojs/node standalone server 运行（监听 3000），nginx 反代 / 到该端口、
+# 反代 /api 到 backend:8090。这样 on-demand SSR 详情页 / sitemap / robots 才能正确产出 HTML。
+FROM node:22-alpine
+RUN apk add --no-cache nginx
+WORKDIR /app
+COPY --from=build /app/dist ./dist
 COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
 EXPOSE 80
-CMD ["nginx", "-g", "daemon off;"]
+ENTRYPOINT ["/entrypoint.sh"]