Consumer/Producer kafka samples

Setup environment:

cd env
docker-compose up

Create kafka topic:

kafka-topics --create --zookeeper localhost:2181 --replication-factor 1 --partitions 3 --topic first-topic
kafka-topics --create --zookeeper localhost:2181 --replication-factor 1 --partitions 3 --topic second-topic
kafka-topics --create --zookeeper localhost:2181 --replication-factor 1 --partitions 3 --topic third-topic