old_contents: import Link from 'next/link'
  
  const linkStyle = {
    marginRight: 15
  }
  
  export default function Header() {
    return (
      <div>
        <Link href="/">
          <a style={linkStyle}>Home</a>
        </Link>
        <Link href="/about">
          <a style={linkStyle}>About</a>
        </Link>
      </div>
    )
  }
new_contents: import Link from 'next/link'
  import Head from 'next/head'
  
  const linkStyle = {
    marginRight: 15
  }
  
  export default function Header() {
    return (
      <div>
        <Head>
          <link rel="manifest" href="/public/manifest.json" />
        </Head>
        <Link href="/">
          <a style={linkStyle}>Home</a>
        </Link>
        <Link href="/about">
          <a style={linkStyle}>About</a>
        </Link>
      </div>
    )
  }
  
subject: Use manifest