Add Tunnelmole as an open source alternative to ngrok and include usa…

…ge instructions (#2846)

README.md

@@ -253,7 +253,28 @@ python3 -m fastchat.serve.gradio_web_server_multi
     - https://github.com/mckaywrigley/chatbot-ui
 - Note some third party provider only offer the stand `gpt-3.5-turbo, gpt-4, etc`, so you will have to add your own custom model inside the code. [Here is an example of a modification of creating a UI with any custom model name](https://github.com/ztjhz/BetterChatGPT/pull/461)
 
+You can find suitable UIs from third party repos:
+- [WongSaang's ChatGPT UI](https://github.com/WongSaang/chatgpt-ui)
+- [McKayWrigley's Chatbot UI](https://github.com/mckaywrigley/chatbot-ui)
 
+- Please note that some third-party providers only offer the standard `gpt-3.5-turbo`, `gpt-4`, etc., so you will have to add your own custom model inside the code. [Here is an example of how to create a UI with any custom model name](https://github.com/ztjhz/BetterChatGPT/pull/461).
+
+##### Using Tunnelmole
+Tunnelmole is an open source tunnelling tool. You can find its source code on [Github](https://github.com/robbie-cahill/tunnelmole-client). Here's how you can use Tunnelmole:
+1. Install Tunnelmole with `curl -O https://install.tunnelmole.com/9Wtxu/install && sudo bash install`. (On Windows, download [tmole.exe](https://tunnelmole.com/downloads/tmole.exe)). Head over to the [README](https://github.com/robbie-cahill/tunnelmole-client) for other methods such as `npm` or building from source.
+2. Run `tmole 7860` (replace `7860` with your listening port if it is different from 7860). The output will display two URLs: one HTTP and one HTTPS. It's best to use the HTTPS URL for better privacy and security.
+```
+➜  ~ tmole 7860
+http://bvdo5f-ip-49-183-170-144.tunnelmole.net is forwarding to localhost:7860
+https://bvdo5f-ip-49-183-170-144.tunnelmole.net is forwarding to localhost:7860
+```
+
+##### Using ngrok
+ngrok is a popular closed source tunnelling tool. First download and install it from [ngrok.com](https://ngrok.com/downloads). Here's how to use it to expose port 7860.
+```
+ngrok http 7860
+```
+
 ## API
 ### OpenAI-Compatible RESTful APIs & SDK
 FastChat provides OpenAI-compatible APIs for its supported models, so you can use FastChat as a local drop-in replacement for OpenAI APIs.