Default SEOMatic tags for layout file

gistfile1.txt

{% set seomaticMeta = {
    seoTitle: seoTitle ?? seomaticMeta.seoTitle,
    seoDescription: seoDescription ?? seomaticMeta.seoDescription,
    seoKeywords: seomaticMeta.seoKeywords,
    seoImage: seoImage ?? seomaticMeta.seoImage,
    canonicalUrl: canonicalUrl ?? seomaticMeta.canonicalUrl,
    twitter: {
        card: seomaticMeta.twitter.card,
        site: seomaticMeta.twitter.site,
        creator: seomaticMeta.twitter.creator,
        title: seoTitle ?? seomaticMeta.seoTitle,
        description: seoDescription ?? seomaticMeta.seoDescription,
        image: seoImage ?? seomaticMeta.seoImage
    },
    og: {
        type: seomaticMeta.og.type,
        locale: seomaticMeta.og.locale,
        url: canonicalUrl ?? seomaticMeta.canonicalUrl,
        title: seoTitle ?? seomaticMeta.seoTitle,
        description: seoDescription ?? seomaticMeta.seoDescription,
        image: seoImage ?? seomaticMeta.seoImage,
        site_name: seomaticMeta.og.site_name,
        see_also: seomaticMeta.og.see_also
    }
} %}

{% hook 'seomaticRender' %}