fixed absent initiation of refill task

config/initializers/docker.rb

@@ -1,6 +1,6 @@
 DockerClient.initialize_environment unless Rails.env.test? && `which docker`.blank?
 
-if defined?(Rails::Server) && ActiveRecord::Base.connection.tables.present? && DockerContainerPool.config[:active]
+if ActiveRecord::Base.connection.tables.present? && DockerContainerPool.config[:active]
   DockerContainerPool.start_refill_task
   at_exit { DockerContainerPool.clean_up }
 end

lib/docker_container_pool.rb

@@ -48,7 +48,7 @@ class DockerContainerPool
   end
 
   def self.start_refill_task
-    @refill_task = Concurrent::TimerTask.new(execution_interval: config[:refill][:interval], run_now: true, timeout_interval: config[:refill][:timeout]) { refill }
+    @refill_task = Concurrent::TimerTask.new(execution_interval: config[:refill][:interval], run_now: false, timeout_interval: config[:refill][:timeout]) { refill }
     @refill_task.execute
   end
 end

spec/lib/docker_container_pool_spec.rb

@@ -144,7 +144,7 @@ describe DockerContainerPool do
     after(:each) { described_class.start_refill_task }
 
     it 'creates an asynchronous task' do
-      expect(Concurrent::TimerTask).to receive(:new).with(execution_interval: interval, run_now: true, timeout_interval: timeout).and_call_original
+      expect(Concurrent::TimerTask).to receive(:new).with(execution_interval: interval, run_now: false, timeout_interval: timeout).and_call_original
     end
 
     it 'executes the task' do