Deploying a chatbot on Vercel

I developed a chatbot using the Telegraf.js framework. Although the latest version of Telegraf offers TypeScript support, I chose to use JavaScript. I followed a tutorial to deploy it and would like to know if there are any security vulnerabilities that can be addressed.

The files involved in the project are as follows:

path: src/bot.js

import { Telegraf } from 'telegraf'

const bot = new Telegraf(process.env.BOT_TOKEN)
bot.start((ctx) => ctx.reply('Welcome'))

export default bot

path: api/index.js

import bot from '../src/bot.js';

export default async function handler(req, res) {
  if (req.method === 'POST') {
    try {
      await bot.handleUpdate(req.body)
      res.status(200).send('OK')
    } catch (err) {
      console.error('Erro ao lidar com update:', err)
      res.status(500).send('Erro interno')
    }
  } else {
    res.status(200).send('Bot do Telegram está rodando com webhook!')
  }
}

path: ./vercel.json

{
  "version": 2,
  "builds": [
    { "src": "api/index.js", "use": "@vercel/node" }
  ],
  "routes": [
    { "src": "/.*", "dest": "api/index.js" }
  ]
}

The deployment was successful; however, I’d like to know if there are any security issues that should be addressed.