How to validate multiple file extensions with joi?

Question

Let's say i want the user to upload only one of two types of files (pdf and docx). i will validate the file using joi.

Can you confirm is this code correct or not?

const joi = require('@hapi/joi')


  const validateFormData = data => {

  const shema = joi.object({
      cv: joi
          .string()
          .valid(['application/msword', 'application/pdf'])
          .required()
  })
  return shema.validate(data, { abortEarly: false })
}

module.exports = {
    validateFormData
}