wagtail_bakerydemo/bakerydemo/jinja2/base/include/header-hero.html

{% if page.image %}
    <div class="container-fluid hero">
        {{ image(page.image, "fill-1920x600", class="hero-image", alt="") }}
        <div class="hero__container">
            <h1 class="hero__title">{{ page.title }}</h1>
        </div>
    </div>
{% else %}
    <div class="container">
        <div class="row">
            <div class="col-md-7">
                <h1>{{ page.title }}</h1>
            </div>
        </div>
    </div>
{% endif %}