合并远端前端修复

deploy/docker/backend.Dockerfile

@@ -7,7 +7,7 @@
 # ============================================================================
 
 # --------------------------- Builder Stage -----------------------------------
-FROM node:22-bookworm AS builder
+FROM docker.m.daocloud.io/library/node:22-bookworm AS builder
 
 ARG DEBIAN_MIRROR=mirrors.cloud.tencent.com
 ARG NPM_REGISTRY=https://registry.npmmirror.com
@@ -49,7 +49,7 @@ RUN npm run build \
   && npm prune --omit=dev
 
 # --------------------------- Runtime Stage -----------------------------------
-FROM node:22-bookworm-slim AS runtime
+FROM docker.m.daocloud.io/library/node:22-bookworm-slim AS runtime
 
 # HTTP mirrors — see builder note about OrbStack TLS
 ENV DEBIAN_FRONTEND=noninteractive