diff --git a/Dockerfile b/Dockerfile
index 94369f1..cbae069 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,11 @@
 # Base-Image
-FROM alpine:3.21
+FROM alpine:latest
 
 # Pakete installieren
 RUN apk add --no-cache build-base gcc
 
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
+
 # Arbeitsverzeichnis setzen
 WORKDIR /app
 
@@ -16,6 +18,14 @@ RUN gcc -o deployment deployment.c
 # Verzeichnis für Ausgabe anlegen
 RUN mkdir /output
 
+VOLUME ["/output"]
+
+USER appuser
+
+#Healthcheck
+HEALTHCHECK --interval=30s --timeout=5s --start-period=15s --retries=3 \
+    CMD test -f /output/output.txt || exit 1
+
 # Ausgabe wird ins Container-Dateisystem geschrieben
 ENTRYPOINT ["/bin/sh", "-c"]
 CMD ["./deployment 10 > /output/output.txt && tail -f /output/output.txt"]
\ No newline at end of file