code: func inlineCSS(filePath string) {
  	input := readFile(filePath)
  
  	output, err := inliner.Inline(string(input))
  	if err != nil {
  		fmt.Println("Inlining error: ", err)
  		os.Exit(1)
  	}
  
  	fmt.Println(output)
  }
docs: // inlines CSS into HTML and display result