Merge der Upgrades für Confluent/Spring-Boot (Branch 'acks-übungen')

diff --cc docker-compose.yml
index b901266,031d936..762a805
--- 1/docker-compose.yml
--- 2/docker-compose.yml
+++ b/docker-compose.yml
@@@ -81,10 -81,9 +81,10 @@@ services
        producer.bootstrap-server: kafka:9092
        producer.client-id: producer
        producer.topic: test
 +      producer.acks: 0
  
    consumer:
-     image: juplo/counting-consumer:1.0-SNAPSHOT
+     image: juplo/endless-consumer:1.0-SNAPSHOT
      ports:
        - 8081:8081
      environment: