{% if src %}
  {# If the image's URL is internal to the site... #}
  {% if src is not starting_with("http") %}
    {# ... then prepend the site's base URL to the image's URL. #}
    {% set src = config.base_url ~ src %}
  {% endif %}
  <center><img src="{{ src | safe }}"{% if alt %} alt="{{ alt }}"{% endif %} class="{% if position %}{{ position }}{% else -%} center {%- endif %}" {%- if style %} style="border-radius: 8px; {{ style | safe }}" {%- endif %} /></center>
{% endif %}