curl --request POST \
  --url https://files-api.ffhub.io/api/upload/file \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form file='@example-file'

{
  "url": "https://storage.ffhub.io/uploads/user123/abc123def456.png",
  "cn_url": "https://beijing-user-upload-tmp.tos-cn-beijing.volces.com/uploads/user123/abc123def456.png",
  "key": "uploads/user123/abc123def456.png",
  "md5": "d41d8cd98f00b204e9800998ecf8427e",
  "size": 12345,
  "content_type": "image/png",
  "expires_at": "2024-01-17T00:00:00.000Z"
}