Hello VizHub
This example demonstrates the minimal setup required to begin using VizHub with D3.js. It renders a simple static text message, "Hello VizHub!", centered on a dark blue background with large Ubuntu typography. The code imports the `select` function from D3 via ES6 modules and uses it to set the text content of a `div` element, while the message itself is defined in a separate local module. Styling is handled entirely through CSS.