Update because of security check

Dockerfile

@@ -1,5 +1,5 @@
 # STAGE 1: Builder
-FROM alpine:latest AS builder
+FROM alpine:3.23 AS builder
 
 # Pakete installieren (gcc & Standardbibliotheken)
 RUN apk add --no-cache gcc musl-dev
@@ -14,11 +14,15 @@ COPY deployment.c .
 RUN gcc -O2 -o deployment deployment.c
 
 # STAGE 2: Runner
-FROM alpine:latest
+FROM alpine:3.23
 
 # Arbeitsverzeichnis setzen
 WORKDIR /app
 
+# OPTIMIERUNG: System-Update durchführen, um CVEs zu fixen
+# 'apk upgrade' installiert die Version 3.3.7-r0 von OpenSSL
+RUN apk update && apk upgrade --no-cache
+
 # Non-Root User anlegen
 # RUN addgroup -S appgroup
 # RUN adduser -S appuser -G appgroup