meghna-hugo/layouts/partials/author-figure.html

<figure>
    {{ if .Params.photo }}
    <img class="rounded-circle img-fluid" src="{{.Params.Photo}}">
    {{else if .Params.email}}
    <img class="rounded-circle img-fluid" src="https://www.gravatar.com/avatar/{{ md5 .Params.email }}?s=128&pg&d=identicon">
    {{ end }}
    <figcaption>
        <h5 class="font-weight-bold">
            {{ .Params.name }}
        </h5>
    </figcaption>
</figure>