Migrate docs from Sphinx to MkDocs (#18145)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

docs/deployment/frameworks/chatbox.md

@@ -0,0 +1,35 @@
+---
+title: Chatbox
+---
+[](){ #deployment-chatbox }
+
+[Chatbox](https://github.com/chatboxai/chatbox) is a desktop client for LLMs, available on Windows, Mac, Linux.
+
+It allows you to deploy a large language model (LLM) server with vLLM as the backend, which exposes OpenAI-compatible endpoints.
+
+## Prerequisites
+
+- Setup vLLM environment
+
+## Deploy
+
+- Start the vLLM server with the supported chat completion model, e.g.
+
+```console
+vllm serve qwen/Qwen1.5-0.5B-Chat
+```
+
+- Download and install [Chatbox desktop](https://chatboxai.app/en#download).
+
+- On the bottom left of settings, Add Custom Provider
+  - API Mode: `OpenAI API Compatible`
+  - Name: vllm
+  - API Host: `http://{vllm server host}:{vllm server port}/v1`
+  - API Path: `/chat/completions`
+  - Model: `qwen/Qwen1.5-0.5B-Chat`
+
+![](../../assets/deployment/chatbox-settings.png)
+
+- Go to `Just chat`, and start to chat:
+
+![](../../assets/deployment/chatbox-chat.png)