Add a "name" field to Debut theme's newsletter (Shopify)

newsletter.liquid

<input type="text"
name="contact[first_name]"
id="{{ formId }}-first_name"
class="input-group__field{% if form.errors %} input--error{% endif %}"
value=""
placeholder="First name"
aria-label="First name"
aria-required="true"
autocorrect="off"
autocapitalize="off"
{% if form.errors %}
aria-invalid="true"
aria-describedby="{{ formId }}-first_name-error"
data-form-status
{% endif %}
>