app/views/layouts/application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Emunah</title>
<%= csrf_meta_tags %>
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
<%= stylesheet_link_tag 'https://fonts.googleapis.com/css?family=Bree+Serif|Merriweather:400,700|Roboto:400,500' %>
<%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>
</head>
<body>
<nav id="navbar" class="navbar navbar-light bg-faded">
<%= link_to image_tag("emunah.png", height: '40px'), home_path, class: "navbar-brand"%>
<div class="navbar-right center-navbar">
<% if !@user.nil? %>
<%= link_to "Logout", logout_path, class: "navbar-link"%>
<% else %>
<%= link_to "Login", home_path, class: "navbar-link" %>
<% end %>
</div>
</nav>
<%= yield %>
</body>
</html>