only copy, no install in runtime stage

Signed-off-by: iripiri <ikoester@eonerc.rwth-aachen.de>

Author: iripiri

Dockerfile

@@ -9,7 +9,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 WORKDIR /app
 COPY . .
 
-RUN python -m build 
+RUN python -m build && \
+    pip install dist/*.tar.gz --prefix=/install
 
 # runtime stage
 FROM python:3.11-slim AS runtime
@@ -19,8 +20,8 @@ ENV PYTHONUNBUFFERED=1 \
     PYTHONDONTWRITEBYTECODE=1 \
     PIP_NO_CACHE_DIR=1
 
-COPY --from=builder /app/dist/*.tar.gz /tmp/
-RUN pip install /tmp/*.tar.gz && rm -rf /tmp/*
+# copy installed Python libs + CLI scripts
+COPY --from=builder /install /usr/local
 
 COPY etc/*.json etc/*.yaml /etc/villas/controller/
 COPY villas-controller.service /etc/systemd/system/