app/views/devise/registrations/new.html.erb
<div class="container text-center">
<div class="row">
<div class="col-md-4">
</div>
<div class="col-md-4 well">
<h2>Sign up</h2>
<%= form_for(resource, as: resource_name, url: registration_path(resource_name), multipart: true) do |f| %>
<%= devise_error_messages! %>
<%= render 'shared/registration_fields', f: f %>
<div class="form-group">
<div class="field">
<%= check_box("Armstrong", "Armstrong", id: "armstrong") %>
<%= label_tag "Armstrong" %>
</div>
</div>
<div class="form-group">
<div class="field">
<%= f.label :password %>
<% if @minimum_password_length %>
<em>(<%= @minimum_password_length %> characters minimum)</em>
<% end %><br />
<%= f.password_field :password, autocomplete: "off", class: "form-control" %>
</div>
</div>
<div class="form-group">
<div class="field">
<%= f.label :password_confirmation %><br />
<%= f.password_field :password_confirmation, autocomplete: "off", class: "form-control" %>
</div>
</div>
<div class="form-group">
<div class="actions">
<%= f.submit "Sign up", class:"btn btn-primary btn-lg btn-block" %>
</div>
</div>
<% end %>
<%= render "devise/shared/links" %>
</div>
</div>
</div>