github create md file with next api

link.js

import moment from 'moment'
import axios from 'axios'
import slug from 'slug'
import metadata from 'url-metadata'
import { string } from 'yup'

const schemaToken = string().matches(/(Bearer)/)
const schemaUrl = string().required().url()

import { baseURL, cleanUrl } from '../../utils/helper'

export default async (req, res) => {
  // HAS TOKEN
  const { authorization } = req.headers
  const isValidToken = await schemaToken.isValid(authorization)

  if (!isValidToken) {
    return await res.status(400).end(JSON.stringify({ message: 'token error' }))
  }

  // HAS URL
  const { url } = req.body
  const isValidUrl = await schemaUrl.isValid(url)

  if (!isValidUrl) {
    return await res.status(400).end(JSON.stringify({ message: 'url error' }))
  }

  // CONTENT
  const { title, description } = await metadata(url)
  const fileName = slug(cleanUrl(url), {
    lower: true
  })

  const CONTENT = `---
title: "${title}"
description: "${description}"
url: "${url}"
date: ${moment().format('YYYY-MM-DD')}
---
`

  try {
    await axios.put(
      `${baseURL}/src/data/links/${fileName}.md`,
      {
        message: `new link: "${fileName}"`,
        content: Buffer.from(CONTENT).toString('base64')
      },
      { headers: { authorization } }
    )
    console.log('created')
    res.status(200).end(JSON.stringify({ message: 'created' }))
  } catch (e) {
    console.log(e)
    res.status(400).end(JSON.stringify({ message: 'ups!!' }))
  }
}