Initial commit: Hugo site with Caddy infra and deploy tooling

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

site/layouts/index.html

@@ -0,0 +1,10 @@
+{{ define "main" }}
+<ul class="post-list">
+  {{ range (where .Site.RegularPages "Type" "posts").ByDate.Reverse }}
+  <li>
+    <time datetime="{{ .Date.Format "2006-01-02" }}">{{ .Date.Format "2006-01-02" }}</time>
+    <a href="{{ .Permalink }}">{{ .Title }}</a>
+  </li>
+  {{ end }}
+</ul>
+{{ end }}