Adding landing page

app/controllers/home_controller.rb

@@ -10,6 +10,10 @@ class HomeController < ApplicationController
   
   private
 
+  def authenticate_user!
+    redirect_to about_path unless user_signed_in?
+  end
+
   def find_or_create_access_token
     Doorkeeper::AccessToken.find_or_create_for(Doorkeeper::Application.where(superapp: true).first, current_user.id, nil, Doorkeeper.configuration.access_token_expires_in, Doorkeeper.configuration.refresh_token_enabled?)
   end