Initial commit: Hugo site with Caddy infra and deploy tooling

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

site/layouts/_default/single.html

@@ -0,0 +1,9 @@
+{{ define "main" }}
+<article>
+  <h1>{{ .Title }}</h1>
+  <p class="post-meta">
+    <time datetime="{{ .Date.Format "2006-01-02" }}">{{ .Date.Format "2 January 2006" }}</time>
+  </p>
+  {{ .Content }}
+</article>
+{{ end }}