Optimize Dockerfile

Dockerfile

@@ -1,22 +1,29 @@
-# Base-Image
-FROM ubuntu:latest
+FROM alpine:3.20 AS builder
 
-# Pakete installieren
-RUN apt-get update
-RUN apt-get install -y build-essential gcc curl vim net-tools
+RUN apk add --no-cache build-base
+
+WORKDIR /app
+COPY deployment.c .
+
+RUN gcc -O2 -o deployment deployment.c
+
+
+FROM alpine:3.20
+
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
 
-# Arbeitsverzeichnis setzen
 WORKDIR /app
 
-# alles kopieren
-COPY . .
+COPY --from=builder /app/deployment /app/deployment
 
-# Code kompilieren
-RUN gcc -o deployment deployment.c
+RUN mkdir -p /output && chown -R appuser:appgroup /app /output
 
-# Verzeichnis für Ausgabe anlegen
-RUN mkdir /output
+USER appuser
 
-# Ausgabe wird ins Container-Dateisystem geschrieben
-ENTRYPOINT ["/bin/bash", "-c"]
-CMD ["./deployment 10 > /output/output.txt && tail -f /output/output.txt"]
+VOLUME ["/output"]
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+  CMD test -f /output/output.txt || exit 1
+
+ENTRYPOINT ["/bin/sh", "-c"]
+CMD ["./deployment 10 >> /output/output.txt && tail -f /output/output.txt"]