ctrlz.es/themes/hugo-bearcub/layouts/partials/social_card.html

<!-- Dynamic social card generation -->
{{ $font := resources.GetRemote "https://github.com/google/fonts/raw/main/ofl/firamono/FiraMono-Bold.ttf" }}
{{ $fg := resources.Get "images/social_card_fg.png"}}
{{ $bg := resources.Get "images/social_card_bg.png"}}

{{ $fg = $fg.Filter (images.Text .Title (dict
    "font" $font
    "color" "#f8f8f2"
    "size" 130
    "linespacing" 20
    "x" 0
    "y" 0
)) }}

{{ $date := .Date.Format (default "2006-01-02" .Site.Params.dateFormat) }}
{{ $author := (default $.Site.Params.author.name ($.Param "author") ) }}
{{ $byline := (printf "%s | %s" $author $date) }}

{{ $fg = $fg.Filter (images.Text $byline (dict
    "font" $font
    "color" "#c9d1d9"
    "size" 60
    "linespacing" 30
    "x" 0
    "y" 425
)) }}

{{ $card := $bg.Filter (images.Overlay $fg 112 140 ) }}
{{ $card := $card.Resize "900x webp q100" }}

<!-- Open Graph / Facebook -->
<!-- Source: https://github.com/gohugoio/hugo/blob/master/tpl/tplimpl/embedded/templates/opengraph.html -->
<meta property="og:title" content="{{ .Title }}" />
<meta property="og:description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end }}" />
<meta property="og:type" content="{{ if .IsPage }}article{{ else }}website{{ end }}" />
<meta property="og:url" content="{{ .Permalink }}" />

<meta property="og:image" content="{{ $card.Permalink | absURL }}"/>

{{- if .IsPage }}
{{- $iso8601 := "2006-01-02T15:04:05-07:00" -}}
<meta property="article:section" content="{{ .Section }}" />
{{ with .PublishDate }}<meta property="article:published_time" {{ .Format $iso8601 | printf "content=%q" | safeHTMLAttr }} />{{ end }}
{{ with .Lastmod }}<meta property="article:modified_time" {{ .Format $iso8601 | printf "content=%q" | safeHTMLAttr }} />{{ end }}
{{- end -}}

{{- with .Params.audio }}<meta property="og:audio" content="{{ . }}" />{{ end }}
{{- with .Params.locale }}<meta property="og:locale" content="{{ . }}" />{{ end }}
{{- with .Site.Params.title }}<meta property="og:site_name" content="{{ . }}" />{{ end }}
{{- with .Params.videos }}{{- range . }}
<meta property="og:video" content="{{ . | absURL }}" />
{{ end }}{{ end }}

{{- /* If it is part of a series, link to related articles */}}
{{- $permalink := .Permalink }}
{{- $siteSeries := .Site.Taxonomies.series }}
{{- if $siteSeries }}
{{ with .Params.series }}{{- range $name := . }}
  {{- $series := index $siteSeries ($name | urlize) }}
  {{- range $page := first 6 $series.Pages }}
    {{- if ne $page.Permalink $permalink }}<meta property="og:see_also" content="{{ $page.Permalink }}" />{{ end }}
  {{- end }}
{{ end }}{{ end }}
{{- end }}

{{- /* Deprecate site.Social.facebook_admin in favor of site.Params.social.facebook_admin */}}
{{- $facebookAdmin := "" }}
{{- with site.Params.social }}
  {{- if reflect.IsMap . }}
    {{- $facebookAdmin = .facebook_admin }}
  {{- end }}
{{- else }}
  {{- with site.Social.facebook_admin }}
    {{- $facebookAdmin = . }}
    {{- warnf "The social key in site configuration is deprecated. Use params.social.facebook_admin instead." }}
  {{- end }}
{{- end }}

{{- /* Facebook Page Admin ID for Domain Insights */}}
{{ with $facebookAdmin }}<meta property="fb:admins" content="{{ . }}" />{{ end }}

<!-- Twitter -->
<!-- Source: https://github.com/gohugoio/hugo/blob/master/tpl/tplimpl/embedded/templates/twitter_cards.html -->
<meta name="twitter:card" content="summary_large_image"/>
<meta name="twitter:image" content="{{ $card.Permalink | absURL }}"/>
<meta name="twitter:title" content="{{ .Title }}"/>
<meta name="twitter:description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end -}}"/>

{{- /* Deprecate site.Social.twitter in favor of site.Params.social.twitter */}}
{{- $twitterSite := "" }}
{{- with site.Params.social }}
  {{- if reflect.IsMap . }}
    {{- $twitterSite = .twitter }}
  {{- end }}
{{- else }}
  {{- with site.Social.twitter }}
    {{- $twitterSite = . }}
    {{- warnf "The social key in site configuration is deprecated. Use params.social.twitter instead." }}
  {{- end }}
{{- end }}

{{- with $twitterSite }}
  {{- $content := . }}
  {{- if not (strings.HasPrefix . "@") }}
    {{- $content = printf "@%v" $twitterSite }}
  {{- end }}
<meta name="twitter:site" content="{{ $content }}"/>
{{- end }}

<!-- Microdata -->
<!-- Source: https://github.com/gohugoio/hugo/blob/master/tpl/tplimpl/embedded/templates/schema.html -->
<meta itemprop="name" content="{{ .Title }}">
<meta itemprop="description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end }}">

{{- if .IsPage -}}
{{- $iso8601 := "2006-01-02T15:04:05-07:00" -}}
{{ with .PublishDate }}<meta itemprop="datePublished" {{ .Format $iso8601 | printf "content=%q" | safeHTMLAttr }} />{{ end}}
{{ with .Lastmod }}<meta itemprop="dateModified" {{ .Format $iso8601 | printf "content=%q" | safeHTMLAttr }} />{{ end}}
<meta itemprop="wordCount" content="{{ .WordCount }}">

<meta itemprop="image" content="{{ $card.Permalink | absURL }}"/>

<!-- Output all taxonomies as schema.org keywords -->
<meta itemprop="keywords" content="{{ if .IsPage}}{{ range $index, $tag := .Params.tags }}{{ $tag }},{{ end }}{{ else }}{{ range $plural, $terms := .Site.Taxonomies }}{{ range $term, $val := $terms }}{{ printf "%s," $term }}{{ end }}{{ end }}{{ end }}" />
{{- end -}}