code: async function createDockerfile (answers) {
    const dockerfileTemplate = await readTemplate('Dockerfile')
    return dockerfileTemplate
      .replace(':NAME', answers.name)
      .replace(':DESCRIPTION', answers.description)
      .replace(':ICON', answers.icon)
      .replace(':COLOR', answers.color)
  }
docs: Creates a Dockerfile contents string, replacing variables in the Dockerfile template
  with values passed in by the user from the CLI prompt.
  
  @param {PromptAnswers} answers The CLI prompt answers.
  @returns {Promise<string>} The Dockerfile contents.