modules: port sitemap, webmanifest, robots.txt, markdown block

modules/wowchemy-tailwind/layouts/_default/_markup/sitemap.xml

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+{{ printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
+        xmlns:xhtml="http://www.w3.org/1999/xhtml">
+  {{/* Check that page is built (has a URL) and is not private. */}}
+  {{ range where (where .Data.Pages "Permalink" "!=" "") "Params.private" "ne" true }}
+  <url>
+    <loc>{{ .Permalink }}</loc>
+    {{- if not .Lastmod.IsZero }}<lastmod>{{ safeHTML ( .Lastmod.Format "2006-01-02T15:04:05-07:00" ) }}</lastmod>{{ end }}
+    {{- with .Sitemap.ChangeFreq }}<changefreq>{{ . }}</changefreq>{{ end }}
+    {{- if ge .Sitemap.Priority 0.0 }}<priority>{{ .Sitemap.Priority }}</priority>{{ end }}
+    {{- if .IsTranslated -}}
+
+    {{- range .Translations -}}
+    <xhtml:link
+      rel="alternate"
+      hreflang="{{ .Language.Lang }}"
+      href="{{ .Permalink }}"
+    />
+    {{- end -}}
+
+    <xhtml:link
+      rel="alternate"
+      hreflang="{{ .Language.Lang }}"
+      href="{{ .Permalink }}"
+    />
+
+    {{- end -}}
+  </url>
+  {{- end -}}
+</urlset>

modules/wowchemy-tailwind/layouts/index.webmanifest

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+{{- $scr := .Scratch -}}
+{{- $theme_color := "#fff" -}}
+{
+  "name": "{{site.Title}}",
+  "short_name": "{{site.Title}}",
+  "lang": "{{ site.LanguageCode | default "en-us" }}",
+  "theme_color": "{{ $theme_color }}",
+  "background_color": "{{ $theme_color }}",
+  "icons": [{
+    "src": "{{ (partial "functions/get_site_icon" 192).RelPermalink }}",
+    "sizes": "192x192",
+    "type": "image/png"
+    }, {
+    "src": "{{ (partial "functions/get_site_icon" 512).RelPermalink }}",
+    "sizes": "512x512",
+    "type": "image/png"
+     }],
+  "display": "standalone",
+  "start_url": "{{ site.Home.RelPermalink }}?utm_source=web_app_manifest"
+}

modules/wowchemy-tailwind/layouts/partials/blocks/markdown.html

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+{{/* Wowchemy Blocks: Markdown */}}
+{{/* Documentation: https://wowchemy.com/blocks/ */}}
+{{/* License: https://github.com/wowchemy/wowchemy-hugo-themes/blob/main/LICENSE.md */}}
+
+{{/* Initialise */}}
+{{ $page := .wcPage }}
+{{ $block := .wcBlock }}
+{{ $text := $block.content.text | emojify | $page.RenderString }}
+
+<div class="flex flex-col justify-center">
+  <article class="container mx-auto prose prose-slate lg:prose-xl dark:prose-invert">
+
+    {{ with $block.content.title }}
+    <h2>{{ . }}</h2>
+    {{end}}
+
+    {{ $text }}
+
+  </article>
+</div>

modules/wowchemy-tailwind/layouts/robots.txt

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+User-agent: *
+
+Sitemap: {{ "sitemap.xml" | absURL }}