
change all "product" word to "customer" word 
```html
 <!-- Start::slide -->
<li class="slide has-sub">
    <a href="javascript:void(0);" class="side-menu__item">
    <i class="bx bxs-sushi side-menu__icon"></i>
    <span class="side-menu__label">Products</span>
    <i class="fe fe-chevron-right side-menu__angle"></i>
    </a>
    <ul class="slide-menu child1">
    <li class="slide side-menu__label1">
        <a href="javascript:void(0)">Products</a>
    </li>
    <li class="slide">
        <a href="{% url 'product_index' %}" class="side-menu__item">Product List</a>
    </li>
    <li class="slide">
        <a href="{% url 'product_create' %}" class="side-menu__item">Add Product</a>
    </li>


    </ul>
</li>
<!-- End::slide -->