node auf V20 gehoben

JS/Dockerfile

@@ -1,7 +1,7 @@
 # Observatory Simulation - Multi-stage Docker Build
 
 # Build Stage
-FROM node:18-alpine AS builder
+FROM node:20-alpine AS builder
 
 LABEL maintainer="Observatory Simulation"
 LABEL description="Teleskop und Kuppel Simulation mit WebSocket-Architektur"
@@ -15,7 +15,7 @@ COPY package*.json ./
 RUN npm ci --only=production && npm cache clean --force
 
 # Production Stage
-FROM node:18-alpine AS production
+FROM node:20-alpine AS production
 
 # Erstelle non-root user für Sicherheit
 RUN addgroup -g 1001 -S nodejs && \