Go mongo indexer json files format

go-mongo-indexer-format.json

[
  {
    "collection": "collection_name",
    "cap": null,
    "index": [
      ["-createdAt"],
      ["-status"],
      ["-trackId"],
      ["-cartId"],
      ["-orderId"],
      ["-groupId"],
      ["-currency"]
    ]
  },
  {
    "collection": "collection_name",
    "cap": null,
    "index": [
      ["-createdAt", "-user.email"],
      ["username"],
      ["-userId"],
    ]
  }
]