Added GroupCategories API route and controller

• Added:
- GroupCategories API route and controller

app/controllers/api/v1/group_categories_controller.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class Api::V1::GroupCategoriesController < Api::BaseController
+  # respond_to :json
+
+  skip_before_action :set_cache_headers
+
+  def index
+    render_cached_json('api:v1:group_categories', expires_in: 1.minute) do
+      ActiveModelSerializers::SerializableResource.new(GroupCategories.all, each_serializer: REST::GroupCategoriesSerializer)
+    end
+  end
+
+end

config/routes.rb

@@ -339,6 +339,7 @@ Rails.application.routes.draw do
       resources :scheduled_statuses, only: [:index, :show, :update, :destroy]
       resources :preferences, only: [:index]
       resources :trends, only: [:index]
+      resources :group_categories, only: [:index]
 
       namespace :gifs do
         get :categories