Dockerfile optimiert

.dockerignore

@@ -1,2 +1,5 @@
 .git
-.gitignore
+.drone.yml
+README.md
+*.tar
+*.tar.gz

Dockerfile

@@ -1,22 +1,33 @@
-# Base-Image
-FROM ubuntu:latest
+FROM alpine:3.23 AS builder
 
-# Pakete installieren
-RUN apt-get update
-RUN apt-get install -y build-essential gcc curl vim net-tools
+RUN apk upgrade --no-cache && apk add --no-cache gcc musl-dev
 
-# Arbeitsverzeichnis setzen
 WORKDIR /app
 
-# alles kopieren
 COPY . .
 
-# Code kompilieren
-RUN gcc -o deployment deployment.c
+RUN gcc -O2 -o deployment deployment.c
 
-# Verzeichnis für Ausgabe anlegen
-RUN mkdir /output
 
-# Ausgabe wird ins Container-Dateisystem geschrieben
-ENTRYPOINT ["/bin/bash", "-c"]
-CMD ["./deployment 10 > /output/output.txt && tail -f /output/output.txt"]
+FROM alpine:3.23
+
+RUN apk upgrade --no-cache
+
+WORKDIR /app
+
+COPY --from=builder /app/deployment /app/deployment
+
+RUN addgroup -S appuser \
+&& adduser -S appuser -G appuser \
+&& mkdir /output \
+&& chown -R appuser:appuser /app /output
+
+VOLUME ["/output"]
+
+USER appuser
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+CMD test -s /output/output.txt || exit 1
+
+ENTRYPOINT ["/bin/sh", "-c"]
+CMD ["./deployment 10 2>&1 | tee /output/output.txt"]