rails new . -d postgresql --skip-javascript --api -T 

rails g model category name:string rails g model post title:string body:text category:references rails g model comment body:text post:references 

rails generate jsonapi:resource category rails generate jsonapi:resource post rails generate jsonapi:resource model 

rails g controller Category --skip-assets rails g controller Posts --skip-assets rails g controller Comments --skip-assets 

jsonapi_resources :categories jsonapi_resources :posts jsonapi_resources :comments 

foreman start