better tutorial

tutorial.md

@@ -15,8 +15,16 @@ docker run  -it -p 7860:7860 fastapi
 curl -X POST http://localhost:7860/reply -H 'Content-Type: application/json' -d '{"msg": "hi"}'
 ```
 
-### Huggingface API
+## Huggingface API
 
 See: https://huggingface.co/docs/hub/api
 
-Access info for a space: https://huggingface.co/api/spaces/ChihChiu29/mychatbot
+Access info for a space: https://huggingface.co/api/spaces/ChihChiu29/mychatbot
+
+## Directly access the server on Huggingface space
+
+Use the embedded address, for example:
+
+```bash
+curl -X POST https://chihchiu29-mychatbot.hf.space/reply -H 'Content-Type: application/json' -d '{"msg": "hi"}'
+```