Add ping/pong health check

app/controllers/ping_controller.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+class PingController < ApplicationController
+  before_action :postgres_connected!
+  after_action :verify_authorized, except: %i[index]
+
+  def index
+    render json: {
+      message: 'Pong',
+      timenow_in_time_zone____: DateTime.now.in_time_zone.to_i,
+      timenow_without_timezone: DateTime.now.to_i,
+    }
+  end
+
+  private
+
+  def postgres_connected!
+    ApplicationRecord.establish_connection
+    ApplicationRecord.connection
+    ApplicationRecord.connected?
+  end
+end

config/routes.rb

@@ -159,6 +159,8 @@ Rails.application.routes.draw do
   post '/evaluate', to: 'remote_evaluation#evaluate', via: [:post]
   post '/submit', to: 'remote_evaluation#submit', via: [:post]
 
+  resources :ping, only: :index, defaults: {format: :json}
+
   mount ActionCable.server => '/cable'
   mount RailsAdmin::Engine => '/rails_admin', as: 'rails_admin'
 end

spec/controllers/ping_controller_spec.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe PingController, type: :controller do
+  describe 'index' do
+    it 'returns the wanted page and answer with HTTP Status 200' do
+      get :index
+
+      expect(response).to have_http_status :ok
+    end
+  end
+end

spec/routing/ping_routing_spec.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe PingController, type: :routing do
+  context 'with routes to #show' do
+    it { expect(get: '/ping').to route_to('ping#index', format: :json) }
+  end
+end