update.html

          <div class="card mt-4">
            <div class="card-header p-3">
                <h5 class="mb-0">새로운 업데이트!</h5>
                <p class="text-sm mb-0">
                    Notifications on this page use Toasts from Bootstrap. Read more details <a href="https://getbootstrap.com/docs/5.0/components/toasts/" target="
">here</a>.
                </p>
            </div>
            <div class="card-body p-3">
                <div class="row">
                    <div class="col-lg-3 col-sm-6 col-12">
                        <button class="btn btn-success w-100 mb-0 toast-btn" type="button" data-target="successToast">Success Notification</button>
                    </div>
                    <div class="col-lg-3 col-sm-6 col-12 mt-sm-0 mt-2">
                        <button class="btn btn-info w-100 mb-0 toast-btn" type="button" data-target="infoToast">Info Notification</button>
                    </div>
                    <div class="col-lg-3 col-sm-6 col-12 mt-lg-0 mt-2">
                        <button class="btn btn-warning w-100 mb-0 toast-btn" type="button" data-target="warningToast">Warning Notification</button>
                    </div>
                    <div class="col-lg-3 col-sm-6 col-12 mt-lg-0 mt-2">
                        <button class="btn btn-danger w-100 mb-0 toast-btn" type="button" data-target="dangerToast">Danger Notification</button>
                    </div>
                </div>
            </div>
        </div>