Some setup you must do manually if you haven't yet:

1. Ensure that the mailer has default URL options in each environment. Here is
   a possible configuration for `config/environments/development.rb`:

     config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }

   In production, :host should be set to the actual host of your application.

2. Ensure you have defined root_url to *something* in your config/routes.rb.
   For example:

     root to: "home#index"

3. Ensure you have flash messages in app/views/layouts/application.html.erb.
   For example:

     <p class="notice"><%= notice %></p>
     <p class="alert"><%= alert %></p>

4. You can copy Proclaim views (for customization) to your app by running:

     rails g proclaim:views