upload is not working

[biloo-dev]

how i can resive the data from response controller

this is my code :
<v-uploader @done="uploadDone" :preview-width="400" upload-file-url="api/images" delete-file-urll="api/images" language='en' :preview-height="300" preview-img="/img/avatar.png"> </v-uploader>
<script> export default { methods: { uploadDone(files){ if(files && Array.isArray(files) && files.length){ console.log(files); } }, } } </script>

code in My Controller :

the response ;

the Console :

i want to get responseText and Pass it to preview-img put i can't please help me Thanks

[TerryZ]

required to response the image full path in server side, and the full data format like as follow:

{
    "success": true,//required field
    "error": null,  //when file upload fail, this field will set the fail reason
    "url": "https://xx/someimg.jpg"//a full path of image to show in thumbnail
}