[Minor] add README for gradio demo.

tinychat/serve/README.md

@@ -0,0 +1,26 @@
+## Gradio demo: VILA with TinyChat
+
+We provide scripts for building your own gradio server to run VILA models with TinyChat. Please run the following commands to launch the server.
+
+#### Launch a controller
+```bash
+python -m tinychat.serve.controller --host 0.0.0.0 --port 10000
+```
+
+#### Launch gradio web server.
+```bash
+python -m tinychat.serve.gradio_web_server --controller http://localhost:10000 --model-list-mode reload --share
+```
+After launching this script, the web interface will be served on your machine and you can access it with a public URL (or localhost URL).
+
+#### Launch a model worker
+
+```bash
+python -m tinychat.serve.model_worker --host 0.0.0.0 --controller http://localhost:10000 --port 40000 --worker http://localhost:40000 --model-path <path-to-fp16-hf-model> --quant-path <path-to-awq-checkpoint>
+```
+
+Note: You can launch multiple model workers onto the same web server. And please remember to specify different ports for each model worker.
+
+### Acknowlegement
+
+This demo is inspired by [LLaVA](https://github.com/haotian-liu/LLaVA). We thank LLaVA for providing an elegant way to build the Gradio Web UI.