layouts/index.html

{{ define "header" }}
<h1 class="subtitle">
    <a href="https://twitter.com/TwitterOSS" target="_blank" rel="noopener">@TwitterOSS</a>
</h1>
<h1 class="large-title">Open Source is Happening</h1>
{{ end }}

{{ define "content" }}
  {{ .Content }}
{{ end }}