OpenSSL container.kt

  class OpenSSLContainer : GenericContainer<OpenSSLContainer>(
    ImageFromDockerfile().withDockerfileFromBuilder { it
        .from("ubuntu:20.04")
        .env("DEBIAN_FRONTEND", "noninteractive")
        .env("LC_ALL", "C.UTF-8")
        .run("apt-get update && apt-get install -y openssl")
        .run("openssl version")
        //we need a running container to call `execInContainer` commands
        .cmd("/bin/bash -c 'while true; do sleep 10; done'")
    })

  
  //use executeInContainer command to run `openssl` calls