SecretScanner http server post format

Hello,
I run SecretScanner as a http server.
But I do not know how to use curl command to POST data to http server.
This is my example:

```
curl -X POST http://0.0.0.0:8080/secret-scan -d '{"image_name_with_tag_list": [""]}' -H 'Content-Type: application/json'
```

And output is:
```
{"error":"Image Name with tag list is required "}
```

I have trace code, and in http.go file, I found the runSecretScan func in line 49.
But I always POST fail to http server, what is POST data format?