sign_in and sign_up views present og meta infos (#5308)

app/controllers/auth/sessions_controller.rb

@@ -8,6 +8,7 @@ class Auth::SessionsController < Devise::SessionsController
   skip_before_action :require_no_authentication, only: [:create]
   skip_before_action :check_suspension, only: [:destroy]
   prepend_before_action :authenticate_with_two_factor, if: :two_factor_enabled?, only: [:create]
+  before_action :set_instance_presenter, only: [:new]
 
   def create
     super do |resource|
@@ -84,6 +85,10 @@ class Auth::SessionsController < Devise::SessionsController
 
   private
 
+  def set_instance_presenter
+    @instance_presenter = InstancePresenter.new
+  end
+
   def home_paths(resource)
     paths = [about_path]
     if single_user_mode? && resource.is_a?(User)