shared-bulma-theme/layouts/entry/single.html

{{ define "main" }}
<div class="container">
    <figure class="image is-2by1">
        <img src="{{.Permalink}}banner.png" alt="">
    </figure>

    <div class="box">
        <h1 class="title">{{ .Title }}</h1>
        <h2 class="subtitle">{{ .Date.Format "January 02 2006" }}</h2>
        <div class="content">
            {{ .Content }}
        </div>
    </div>
</div>
{{ end }}