ref: https://docs.streamlit.io/en/stable/getting_started.html
ref: https://discuss.streamlit.io/t/how-to-use-streamlit-in-docker/1067/7
build the image with
docker image build -t st:app .
then ran the container with
docker container run -p 8501:8501 st:app
After that, access the streamlit app at http://localhost:8501/