app/views/users/new.html.erb
<%= form_for @user, html: {class: "form-horizontal"} do |f| %>
<div class="form-group">
<h1 class="text-center">Welcome! Please Register</h1>
<div class="row">
<div class="text-center">
<p class="alert-error"><%= flash[:notice] %></p>
<% @user.errors.full_messages.each do |error| %>
<p class="alert-error"><%= error %></p>
<% end %>
</div>
</div>
<div class="col-sm-offset-5 col-sm-10" style="padding-top: 1%;">
<%= f.label :email, class: "col-sm-5 control-label" %>
<%= f.email_field :email %>
</div>
<div class="col-sm-offset-5 col-sm-10">
<%= f.label :password, class: "col-sm-5 control-label" %>
<%= f.password_field :password %>
</div>
<div class="col-sm-offset-5 col-sm-10">
<%= f.label :password_confirmation, class: "col-sm-5 control-label" %>
<%= f.password_field :password_confirmation %>
</div>
<div class="text-center">
<%= f.submit :Register, class: "btn btn-primary btn-lg" %>
</div>
</div>
<% end %>