* JAVA-31644 Update maven-compiler-plugin to 3.12.1
* JAVA-31644 Update maven compiler plugin to 3.12.1 for more modules
* JAVA-31644 Continue upgrading modules to use maven-compiler-plugin 3.12.1
* BAEL-5957: Creaet prime number finder for Kubernetes heap dump
* add dockerfile, kubernetes deploy file
* use baeldung namespace
* add saving primes to a list