app/views/devise/registrations/new.html.erb
<%= render partial: "shared/error_message_detailed", locals: {entity: resource} %>
<div class="panel panel-default devise-bs">
<div class="panel-heading">
<h4><%= t('.sign_up', :default => "Sign up") %></h4>
</div>
<div class="panel-body">
<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name), html: { role: "form" }) do |f| %>
<div class="form-group">
<%= f.label :email %>
<%= f.email_field :email, autofocus: true, class: "form-control" %>
</div>
<div class="form-group">
<%= f.label :password %>
<%= f.password_field :password, class: "form-control" %>
</div>
<div class="form-group">
<%= f.label :password_confirmation %>
<%= f.password_field :password_confirmation, class: "form-control" %>
</div>
<%= f.submit t('.sign_up', :default => "Sign up"), class: "btn btn-primary" %>
<% end %>
</div>
</div>
<%= render "devise/shared/links" %>