app/views/password_reset_keys/new.html.erb
<h1>Forgot password</h1>
<%= form_tag password_reset_keys_path do %>
<div class="form-group">
<label for='email'>Email</label>
<%= text_field_tag :email, nil, class: 'form-control', id: 'email', placeholder: 'Email' %>
</div>
<%= submit_tag 'Send password reset link', class: 'btn btn-primary' %>
<% end %>