jrtechs-NodeJSBlog/admin/addCategory.html

<div class="w3-third w3-container">

    <h1 class="w3-text-teal w3-center">Add Category</h1>

    <form action="/admin/" method ="post" class="w3-container w3-card-4">
        <div class="w3-group w3-padding-16">
            <input class="w3-input" type="text" name="add_category" required>
            <label class="w3-label w3-validate">Category</label>
        </div>
        <p><input type="submit" name="submit" value="Add"
                  class="w3-padding-16 w3-hover-dark-grey w3-btn-block w3-center-align"/></p>
    </form>
</div>