Use default Rails healthcheck

config/deploy.yml

@@ -52,7 +52,3 @@ builder:
   remote:
     arch: arm64
     host: ssh://kamal@tsvallender.co.uk
-
-healthcheck:
-  path: /sessions/new
-  port: 3000

config/routes.rb

@@ -15,4 +15,6 @@ Rails.application.routes.draw do
   resources :blog_posts
   resources :microposts
   resources :tags, only: [:index, :show]
+
+  get "up" => "rails/health#show", as: :rails_health_check
 end