Initiates an uploading stream. In case of success a file name will be returned, which is the same as you've provided in the header or, if omitted, generated by the server in the form of UUID.
Path:
POST /uploads
Authorization: Bearer <token>
File-Name: <name> // prefer `UUID` to avoid a name clash with an existing file
Content-Type: <file_type> // a file extension such as `png`, `mp4` etc.
Response: a name of the file from which a link can be constructed - http://<your_server[:port]>/files/<file_name>.<file_type>
See also: upload test with an uploading client example.