update dependency

Dockerfile

@@ -64,6 +64,7 @@ RUN mkdir -p /home/user/matplotlib && chmod -R u+rwx /home/user/matplotlib
 RUN apt-get update
 RUN apt-get install build-essential libssl-dev ca-certificates libasound2 wget
 RUN apt-get install -y ffmpeg
+RUN apt-get install -y graphviz
 
 RUN python -m playwright install-deps
 RUN PLAYWRIGHT_BROWSERS_PATH=/home/user/app/ms-playwright python -m playwright install chromium