website/layouts/index.html

{{- define "header" }}
<header id="introduction" class="global-header">
    <h1>{{ i18n "introduction-heading" }}</h1>
    <p>{{ i18n "introduction-sub" }}</p>
</header>
{{ end }}

{{- define "main" }}
    <main>
        {{ .Content }}
    </main>
{{- end }}