custom.json

{
    "attribution": "",
    "bounds": [
        -180,
        -85.0511,
        180,
        85.0511
    ],
    "center": [
        0,
        0,
        0
    ],
    "format": "pbf",
    "id": "custom.custom-vtiles",
    "maskLevel": 8,
    "maxzoom": 14,
    "minzoom": 0,
    "name": "Custom Vector Tiles",
    "scheme": "xyz",
    "tilejson": "2.0.0",
    "tiles": [
        "http://localhost:4000/{z}/{x}/{y}.vtile"
    ],
    "vector_layers": [
        {
            "description": "world borders.",
            "fields": { },
            "geometry": "polygon",
            "id": "world",
            "minzoom": 0
        }
    ]
}