chore(deps)(deps): bump node from 20-alpine to 24-alpine in /Frontend

Bumps node from 20-alpine to 24-alpine.

---
updated-dependencies:
- dependency-name: node
  dependency-version: 24-alpine
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Frontend/Dockerfile

@@ -1,5 +1,5 @@
 # ===== Stage 1: Build des Angular SSR Projekts =====
-FROM node:20-alpine AS builder
+FROM node:24-alpine AS builder
 WORKDIR /app
 
 # Installiere pnpm global
@@ -16,7 +16,7 @@ COPY . .
 RUN pnpm run build
 
 # ===== Stage 2: Runtime =====
-FROM node:20-alpine
+FROM node:24-alpine
 WORKDIR /app
 
 # Installiere pnpm für das Runtime Image