hugo-shopping-product-catalogue-simple/layouts/partials/products/common/site-main-nav.html

<nav class="navbar navbar-expand navbar-light justify-content-center">
    <ul class="navbar-nav">
        <li class="nav-item">
            <a class="nav-link" href="{{ "products/" | absURL }}">All</a>
        </li>
        {{ range ($.Site.GetPage "taxonomyTerm" "categories").Pages }}
        <li class="nav-item">
            <a class="nav-link" href="{{ .Permalink }}">{{ .Title | title }}</a>
        </li>
        {{ end }}
    </ul>
</nav>