<nav class="topbar">
  <div class="logo">
    <%= link_to root_path do %>
      <%= image_tag 'logo.png' %>
    <% end %>
  </div>

  <div class="button-container">
    <ul>
      <li><%= link_to "Sign Out", destroy_admin_session_path, method: :delete %></li>
      <li><%= link_to "Admin Home", admin_path %></li>
    </ul>
  </div>
</nav>

<nav class="topbar">
  <div class="logo">
    <%= link_to root_path do %>
      <%= image_tag 'logo.png' %>
    <% end %>
  </div>

  <div class="button-container">
    <ul>
      <li><%= link_to "Sign Out", destroy_admin_session_path, method: :delete %></li>
      <li><%= link_to "Admin Home", admin_path %></li>
      <li><%= link_to "Products", admin_products_path%></li>
    </ul>
  </div>
</nav>

Add products link to admin tobbar
Add products link to admin tobbar

Added a link to the admin topbar so you can navigate easilly to the
admin products page
