###

POST http://localhost:5000/caption
Content-Type: application/json

{
    "image_url": "http://images.cocodataset.org/test-stuff2017/000000009384.jpg"
}

###

POST http://localhost:5000/caption
Content-Type: application/json

{
    "image_url": "https://static.todamateria.com.br/upload/ur/so/ursopolarreproducao-cke.jpg?auto_optimize=low"
}

###