deploy.js

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