index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
    <link rel="stylesheet" href="css/styles.css">
    <script src="https://kit.fontawesome.com/c78e5bfda2.js"></script>
    <title>To Do List - App</title>
</head>
<body>
    <div class="container">

        <header class="text-center text-light my-4">
            <h1 class="mb-4">Todo list</h1>
            <form class="search">
                <input class="form-control m-auto" type="text" name="search" placeholder="search todos">
            </form>
        </header>
        
        <ul class="list-group todos mx-auto text-light">
            <li class="list-group-item d-flex justify-content-between align-items-center">
                <span>The first</span>
                <i class="far fa-trash-alt delete"></i>
            </li>
            <li class="list-group-item d-flex justify-content-between align-items-center">
                <span>The second</span>
                <i class="far fa-trash-alt delete"></i>
            </li>
            <li class="list-group-item d-flex justify-content-between align-items-center">
                <span>The third</span>
                <i class="far fa-trash-alt delete"></i>
            </li>
        </ul>

        <form class="add text-center my-4">
            <label class="text-light">Add new todo...</label>
            <input class="form-control m-auto" type="text" name="add">
        </form>
        
    </div>
    
    <script src="app.js"></script>
</body>
</html>