curl --request GET \
  --url http://localhost:8080/cabinet/contests

[
  {
    "id": 123,
    "slug": "<string>",
    "name": "<string>",
    "prize_type": "<string>",
    "prize_value": "<string>",
    "is_available": true,
    "description": "<string>",
    "already_played": false
  }
]