chore(deps): bump node in /services/backoffice

Bumps node from 20.19.0-alpine to 25.1.0-alpine.

---
updated-dependencies:
- dependency-name: node
  dependency-version: 25.1.0-alpine
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

services/backoffice/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:20.19.0-alpine AS builder
+FROM node:25.1.0-alpine AS builder
 
 WORKDIR /app
 COPY . .
@@ -11,7 +11,7 @@ RUN npm install
 RUN npm run build -- --base-href=$BASE_HREF
 
 # Use same compatible Node version for runtime
-FROM node:20.19.0-alpine AS runner
+FROM node:25.1.0-alpine AS runner
 
 WORKDIR /app
 COPY --from=builder /app /app