hugo-theme-hello-friend/layouts/partials/logo.html

<a href="{{ .Site.BaseURL }}" style="text-decoration: none;">
  <div class="logo">
    {{ if .Site.Params.Logo }}
      <img src="{{ .Site.Params.Logo.path }}" alt="{{ .Site.Params.Logo.alt }}" />
    {{ else }}
      <span class="logo__mark">></span>
      <span class="logo__text">hello friend</span>
      <span class="logo__cursor"></span>
    {{ end }}
  </div>
</a>