code cleanup

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

Dockerfile

@@ -1,11 +1,33 @@
-# Dockerfile für bambu.py
-FROM python:3.11-slim
+## Dockerfile for bambu.py
+FROM python:3.11.7-alpine
+
+LABEL maintainer="Peter Siegmund <mars3142@noreply.mars3142.dev>"
+LABEL org.opencontainers.image.source="https://git.mars3142.dev/mars3142/bambu_mqtt"
+LABEL org.opencontainers.image.description="MQTT-Bridge für BambuLab Drucker"
+LABEL org.opencontainers.image.version="0.1.0"
 
 WORKDIR /app
 
+## Copy only requirements.txt first for better caching
+COPY requirements.txt /app/requirements.txt
+RUN apk add --no-cache build-base libffi-dev openssl-dev \
+    && python -m venv /app/.venv \
+    && /app/.venv/bin/pip install --no-cache-dir -r /app/requirements.txt \
+    && apk del build-base libffi-dev openssl-dev
+
+## Now copy the actual code
 COPY bambu.py /app/bambu.py
 
-# Optional: requirements.txt falls weitere Pakete benötigt werden
-RUN pip install --no-cache-dir paho-mqtt dotenv
+## Create non-root user
+RUN adduser -D -h /app appuser \
+    && chown -R appuser:appuser /app
+USER appuser
 
-CMD ["python", "-u", "bambu.py"]
+ENV PATH="/app/.venv/bin:$PATH"
+
+## Healthcheck: checks if the process is running (simple example)
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+    CMD pgrep -f "python -u bambu.py" || exit 1
+
+## ENTRYPOINT for better extensibility
+ENTRYPOINT ["python", "-u", "bambu.py"]