### HTML Structure for Ultravox Web Quickstart Source: https://github.com/fixie-ai/ultradox/blob/main/gettingstarted/quickstart/web-app.mdx This HTML file sets up the user interface for the Ultravox web quickstart. It includes input fields for API key and system prompt, along with buttons to start and end calls. It also features a warning about using this in production due to exposed API keys and CORS bypass. ```html Ultravox Web Quickstart

DEVELOPMENT ONLY - DO NOT USE IN PRODUCTION

This interface exposes API keys in client-side code and uses unsafe headers to bypass CORS.

For a robust example, see the nextjs-ts example.

Call Status

Ready

Your API key will be used to create the call. Keep this secure!

This prompt will define how the AI assistant behaves during the call.