deploy-commands.js

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

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

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

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

(async () => {
  try {
    console.log('Started refreshing application (/) commands.');

    await rest.put(
      Routes.applicationGuildCommands(process.env.CLIENT_ID, process.env.GUILD_ID),
      { body: commands },
    );

    console.log('Successfully reloaded application (/) commands.');
  } catch (error) {
    console.error(error);
  }
})();