update README

Signed-off-by: ふぁ <[email protected]>

Author: fa0311

README.md

@@ -21,6 +21,18 @@ or
 python -m return-line-notify.main
 ```
 
+## Send Request
+
+![1744545368191](image/README/1744545368191.png)!
+
+```python
+import requests
+API_URI = "http://127.0.0.1:8000/api/notify"
+headers = {"Authorization": "Bearer 336355274:10"}
+data = {"message": "test"}
+requests.post(API_URI, headers=headers, data=data)
+```
+
 ## Credits
 
 This project is inspired by and references the following open-source project: