Returns specific documentation

Example response

{
  "data": {
    "id": 1,
    "assignment_id": 1,
    "author_id": 1,
    "upload_id": 1,
    "upload2_id": 1,
    "title": "Title",
    "description": "Description",
    "type": "note",
    "state": "done",
    "first_line": "First line",
    "icon": "fas fa-file",
    "color": "#000000",
    "contrast_color": "WHITE"
  }
}