oca-ocb-sale/odoo-bringout-oca-ocb-website_sale_stock/website_sale_stock/data/template_email.xml

<?xml version="1.0" ?>
<odoo>
    <template id="availability_email_body">
        <div id="body">
            <p>Dear Customer,</p>
            <p>The following product is now available.</p>
            <div style="display: flex; justify-content: center; width: 100%;">
                <a t-attf-href="#{product.website_url}">
                    <img t-attf-src="/web/image/product.product/#{product.id}/image_1920"/>
                </a>
            </div>
            <div style="display: flex; flex-direction: row; align-items: center; justify-content: center; width: 100%;">
                <p t-out="product.name"/>
                <p t-if="product.product_template_attribute_value_ids"
                   style="margin-left: 0.5em;">
                    (<t
                    t-out="', '.join(product.product_template_attribute_value_ids.mapped('name'))"
                    />)
                </p>
            </div>
            <p t-out="product.description_sale"/>
            <div style="display: flex; justify-content: center; width: 100%;">
                <a t-attf-href="#{product.website_url}" t-attf-style="background-color: {{product.website_id.get_current_website().company_id.email_secondary_color or '#875A7B'}}; padding: 8px 16px 8px 16px; text-decoration: none; color: {{product.website_id.get_current_website().company_id.email_primary_color or '#FFFFFF'}}; border-radius: 5px; font-size:13px;">
                    Order Now
                </a>
            </div>
            <p>Regards,</p>
        </div>
    </template>
</odoo>