curl --location --request POST 'https://openapi.postly.ai/v1/files' \
--header 'X-File-Size: 29994' \
--header 'X-API-KEY: <api-key>' \
--form 'file=@""'{
"code": 200,
"message": "File uploaded successfully",
"data": {
"url": "https://files.postly.ai/a.png",
"type": "image/png"
}
}