Incorrect startup documentation

[GiganteX]

$ cp .env.example .env
cp: cannot stat '.env.example': No such file or directory

There is no such file.

"If you want to use another LLM, you can set up any Langchain model"

That URL is not working.

"Edit the .env file and set the GITHUB_LINK environment variable with the GitHub repository link and OPENAI_API_KEY
OPENAI_API_KEY=
OPENAI_API_BASE=
OPENAI_API_TYPE=azure"

And what should those values be?
I guess I need an OpenAI key?
What is BASE?