jrtechs-NodeJSBlog/admin/addCategory.html

<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>