old_contents: export default function Meta(post) {
    const author = post?.extra?.author || "Urbit";
    const title = post?.title ? `${post.title} - ` : "";
    const description =
      post?.description || "Urbit is a personal server built from scratch.";
    const image =
      post?.extra?.image || "https://media.urbit.org/logo/urbit-logo-card.png";
    return (
      <>
        <link rel="icon" type="image/png" href="/images/favicon.ico" />
        <meta
          name="twitter:card"
          content="summary_large_image"
          key="twitter-card"
        />
        <meta name="twitter:site" content="@urbit" key="twitter-site" />
        <meta name="twitter:creator" content="@urbit" key="twitter-creator" />
        <meta name="og:title" content={`${title}urbit.org`} key="title" />
        <meta name="og:description" content={description} key="description" />
        <meta name="description" content={description} />
        <meta name="author" content={author} key="author" />
        <meta name="twitter:image" content={image} key="image" />
        <link
          rel="alternative"
          type="application/rss+xml"
          title="RSS"
          href="/rss.xml"
        />
      </>
    );
  }
  
new_contents: export default function Meta(post, disableImage) {
    const author = post?.extra?.author || "Urbit";
    const title = post?.title ? `${post.title} - ` : "";
    const description =
      post?.description || "Urbit is a personal server built from scratch.";
    const image =
      post?.extra?.image || "https://media.urbit.org/logo/urbit-logo-card.png";
    return (
      <>
        <link rel="icon" type="image/png" href="/images/favicon.ico" />
        <meta
          name="twitter:card"
          content="summary_large_image"
          key="twitter-card"
        />
        <meta name="twitter:site" content="@urbit" key="twitter-site" />
        <meta name="twitter:creator" content="@urbit" key="twitter-creator" />
        <meta name="og:title" content={`${title}urbit.org`} key="title" />
        <meta name="og:description" content={description} key="description" />
        <meta name="description" content={description} />
        <meta name="author" content={author} key="author" />
        {!disableImage && (
          <meta name="twitter:image" content={image} key="image" />
        )}
        <link
          rel="alternative"
          type="application/rss+xml"
          title="RSS"
          href="/rss.xml"
        />
      </>
    );
  }
  
subject: allow disabling fallback image