Add attach file button in web page for supplier quotation

[Aditya_vig1]

I need to extend the html template of Request For Quotation. Just need to add one attach field in this template

and this is the standard html code of
{% extends “templates/web.html” %}

{% block header %}

{{ doc.name }}

{% endblock %}

{% block script %}

{% endblock %}

{% block breadcrumbs %}
{% include “templates/includes/breadcrumbs.html” %}
{% endblock %}

{% block header_actions %}
{% if doc.items %}

{{ _(“Make Quotation”) }}
{% endif %}
{% endblock %}

{% block page_content %}

{{ doc.supplier }}

{{ doc.get_formatted("transaction_date") }}

{{ _("Items") }}

{{ _("Qty") }}

{{ _("Rate") }}

{{ _("Amount") }}

---

{% if doc.items %}

{% include "templates/includes/rfq/rfq_items.html" %}

{% endif %}

{% if doc.items %}

{{ _("Grand Total") }}

{{doc.currency_symbol}} 0.0

{% endif %}

{{ _("Notes: ") }}

{{ _("Quotations: ") }}

{% if doc.rfq_links %}

{% for d in doc.rfq_links %}

{{d.name}}

{{d.status}}

{{d.transaction_date}}

Link

{% endfor %}

{% endif %}

{% endblock %}

can you please tell me how can i extend this html page functionality

[NCP]

Similar example: Custom HTML Template ERPNext 15 - #2 by NCP