Render Hello World

How do we tell Streamlit to map a Streamlit call to specific frontend code?

To help answer this, we will build a component to render a <h1>Hello world</h1> block.

If you did not follow the previous Project Setup section, feel free to grab the code setup from the part1 branch of the project:

$ git clone
$ git checkout part1
$ cd streamlit_custom_slider/frontend
$ npm install