getReadmeTemplatePath = async (customTemplate, useDefaultAnswers) => {
  const templatePath = isNil(customTemplate)
    ? await chooseTemplate(useDefaultAnswers)
    : customTemplate

  validateReadmeTemplatePath(templatePath)

  return templatePath
}
Get readme template path
(either a custom template, or a template that user will choose from prompt)

@param {String} customTemplate