Olá eu clonei o repositório do curso anterior https://github.com/alura-cursos/spring-mvc-i-criando-aplicacoes-web-master e ao finalizar a compra estou recebendo um erro 500 oa acessar a url http://book-payment.herokuapp.com/payment.
org.springframework.web.client.ResourceAccessException: I/O error on POST request for "http://book-payment.herokuapp.com/payment":Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connectHTTP Status 500 - Request processing failed; nested exception is org.springframework.web.client.ResourceAccessException: I/O error on POST request for "http://book-payment.herokuapp.com/payment":Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect
