deploy-commands.js

const fs = require("fs");
const { REST } = require("@discordjs/rest");
const { Routes } = require("discord-api-types/v9");
require("dotenv").config();

const commands = [];
const commandFiles = fs.readdirSync("./commands").filter(file => file.endsWith(".js"));

for (const file of commandFiles) {
    const command = require(`./commands/${file}`);
    commands.push(command.data.toJSON());
}

const rest = new REST({ version: "9" }).setToken(process.env.DISCORD_TOKEN);

(async () => {
    try {
        console.log("Attempting to register application commands.");

        await rest.put(
            Routes.applicationCommands(process.env.APP_ID),
            { body: commands },
        );

        console.log("Successfully registered application commands.");
    } catch (error) {
        console.error(error);
    }
})();