chore: 合并前端修复并调整 Docker 镜像源

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
@@ -48,7 +48,7 @@ RUN --mount=type=cache,target=/ms-playwright-cache,sharing=locked \
 COPY apps/backend/ ./
 
 # --------------------------- 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