It’s the easiest way I have yet seen to get started developing and deploying a simple Streamlit app to the public.
It’s so easy that all you have to do is sign up for an account, go to the link https://glitch.com/~hello-streamlit and click “Remix you own”. Then you will have you own docker container running and a public url like the above.
I have not tried it out. So if you do please let me know if it works.