How can I modify the Next.JS Demo to make rag enable?

Hi everyone,
I'm a student currently working on a project that involves adding Retrieval-Augmented Generation (RAG) functionality to HeyGen. I'm new to Next.js and am having trouble figuring out how the responses are being generated. I already have working Django REST framework code for the RAG API, but I need help integrating it into my project.

Any guidance would be greatly appreciated!