Bump node from 18-alpine to 25-alpine

Bumps node from 18-alpine to 25-alpine.

---
updated-dependencies:
- dependency-name: node
  dependency-version: 25-alpine
  dependency-type: direct:production
...

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

Author: dependabot[bot]

frontend.Dockerfile

@@ -7,7 +7,7 @@ COPY .git .
 RUN git describe --tags |  sed 's/^v//' > git_describe.txt
 
 # Builder
-FROM node:18-alpine AS builder
+FROM node:25-alpine AS builder
 
 WORKDIR /app
 COPY ./frontend/package.json ./frontend/package-lock.json ./