app/views/home/_two_column_image_deck.html.erb
<div class="row bg-light pb-4 pt-4">
<div class="card-deck col-md-12">
<div class="card rounded card-2px-border">
<%= image_tag(column_one, class: "img-fluid card-img-top") %>
</div>
<div class="card rounded card-2px-border">
<%= image_tag(column_two, class: "img-fluid card-img-top") %>
</div>
</div>
</div>