Improve Documentation Security Considerations

[breadtk]

Change the default OLLAMA_HOST example to be something more secure and referenced actual underlying format as defined in client.go

[breadtk]

Motivation for writing this commit is because people seem to be configuring Ollama incorrectly. See: https://www.shodan.io/search?query=port%3A11434+product%3A%22Ollama%22