app/views/devise/mailer/confirmation_instructions.html.erb
<p><%= t(:welcome).capitalize + ' ' + @email %>!</p>
<p><%= t '.confirm_link_msg' %> </p>
<p><%= link_to t('.confirm_account_link'), confirmation_url(@resource, {confirmation_token: @token, config: message['client-config'].to_s, redirect_url: message['redirect-url']}).html_safe %></p>