Add Health Check endpoint

app/controllers/health_check_controller.rb

@@ -0,0 +1,5 @@
+class HealthCheckController < ApplicationController
+  def index
+    render :plain => "OK"
+  end
+end

config/environments/production.rb

@@ -2,6 +2,7 @@ Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
   config.force_ssl = true
+  config.ssl_options = { redirect: { exclude: -> request { request.path =~ /healthcheck/ } } }
 
   # Code is not reloaded between requests.
   config.cache_classes = true

config/routes.rb

@@ -1,3 +1,5 @@
 Rails.application.routes.draw do
+  get "/healthcheck" => "health_check#index"
+
   root 'application#app'
 end