diff --git a/docs/features/techdocs/getting-started.md b/docs/features/techdocs/getting-started.md
index 66772c861d..2c365bb5b9 100644
--- a/docs/features/techdocs/getting-started.md
+++ b/docs/features/techdocs/getting-started.md
@@ -297,7 +297,9 @@ You can do so by including the following lines right above `USER node` of your
 `Dockerfile`:
 
 ```Dockerfile
-RUN apt-get update && apt-get install -y python3 python3-pip python3-venv
+RUN apt-get update && \
+    apt-get install -y python3 python3-pip python3-venv && \
+    rm -rf /var/lib/apt/lists/*
 
 ENV VIRTUAL_ENV=/opt/venv
 RUN python3 -m venv $VIRTUAL_ENV