First draft at OpenWebUI RAG lab

[jbusche]

First Draft of a RAG lab. I previewed it with these steps:

git clone https://github.com/jbusche/opensource-ai-workshop -b jim-rag-draft1
cd opensource-ai-workshop/
python3 -m venv venv
. venv/bin/activate
pip install --upgrade pip
pip install mkdocs-material
pip install "mkdocs-material[imaging]"
mkdocs build
python3 -m http.server --directory site

And then bring up this local url on your browser:
http://localhost:8000/lab-7.5/