internal/web/templates/404.html

 1{{define "title"}}not found · {{.Site}}{{end}}
 2{{define "content"}}
 3<div class="notfound">
 4  <p class="bigcode">404</p>
 5  <h1>page not found</h1>
 6  <p class="desc">nothing lives at this address — the path may be wrong,
 7  or the repository may be private.</p>
 8  <p><a href="/">← back to {{.Site}}</a></p>
 9</div>
10{{end}}