curl --request POST \
  --url https://cloud.laravel.com/api/applications/{application}/avatar \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form avatar='@example-file'

{
  "data": {
    "id": "<string>",
    "attributes": {
      "name": "<string>",
      "slug": "<string>",
      "slack_channel": "<string>",
      "avatar_url": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "repository": {
        "full_name": "<string>",
        "default_branch": "<string>"
      }
    },
    "relationships": {
      "repository": {
        "data": {
          "id": "<string>"
        }
      },
      "organization": {
        "data": {
          "id": "<string>"
        }
      },
      "environments": {
        "data": [
          {
            "id": "<string>"
          }
        ]
      },
      "deployments": {
        "data": [
          {
            "id": "<string>"
          }
        ]
      },
      "defaultEnvironment": {
        "data": {
          "id": "<string>"
        }
      }
    }
  },
  "included": [
    {
      "id": "<string>",
      "attributes": {
        "name": "<string>"
      }
    }
  ]
}