Use docker volumes to persist states (conduktor#96)

* add docker volumes

* update all recipes ♻️

* fix typo

* add doc 📝

feat: upgrade to confluent 5.5.1 (conduktor#71)

feat: upgrade to confluent 5.5.0 (conduktor#67)

feat: upgrade to confluent 5.4.1 (conduktor#65)

feat: upgrade to confluent 5.4.0 (conduktor#61)

feat: upgrade to confluent 5.3.1 (conduktor#59)

feat: upgrade to confluent 5.3.0 and kafka 2.3.0 (conduktor#57)

upgrade: bump kafka to 2.2.1 and confluent to 5.2.2 (conduktor#55)

* upgrade: kafka to 2.2.1 and confluent to 5.2.2

* Update README.md

feat: upgrade to confluent 5.2.1 and kafka 2.2.0 (conduktor#52)

fix: correct README.md from two to three brokers (conduktor#51)