<section class="home promo__section d-flex flex-column justify-content-center" 
  style="background-image:url(./img/hero_homepage.jpg)" >
  <div class="promo__container container text-center">
    <h1>{{ .Param "promo-h1" }}</h1>
    <p>{{ .Param "promo-p1" }}</p>
    <p><a class="btn btn-light btn-outline-primary" href="/join">{{ .Param "promo-cta" }}</a></p>
  </div>
</section>