Change HTTP links to HTTPS

spec/lib/runner/strategy/docker_container_pool_spec.rb

@@ -7,7 +7,7 @@ describe Runner::Strategy::DockerContainerPool do
   let(:runner_id) { attributes_for(:runner)[:runner_id] }
   let(:execution_environment) { create :ruby }
   let(:container_pool) { described_class.new(runner_id, execution_environment) }
-  let(:docker_container_pool_url) { 'http://localhost:1234' }
+  let(:docker_container_pool_url) { 'https://localhost:1234' }
   let(:config) { {url: docker_container_pool_url, unused_runner_expiration_time: 180} }
   let(:container) { instance_double(Docker::Container) }