Making a discord banner

so im trying to use a font to make a discord banner to go ontop of an npc.
my default.json:
{
    "providers": [
        {
            "type":"bitmap",
            "file":"minecraft:font/discord.png",
            "ascent": 13,
            "height": 138,
            "chars": ["西"]
        }
    ]
}```
then in textures/font is discord.png. Please someone help 🙂