chexpire/app/views/shared/_notices.html.erb

<div class="container">
  <div class="row justify-content-center">
    <div class="col-12 col-lg-10">
      <% if notice.present? %>
        <div class="alert alert-success alert-layout" role="alert"><%= notice %></div>
      <% end %>

      <% if alert.present? %>
        <div class="alert alert-danger alert-layout" role="alert"><%= alert %></div>
      <% end %>
    </div>
  </div>
</div>