build.sbt snippet for enabling dockering a scala application using sbt-native-packager

build.sbt

import com.typesafe.sbt.packager.docker.{ExecCmd, _}

enablePlugins(JavaAppPackaging)
enablePlugins(DockerPlugin)

dockerBaseImage := "openjdk:8-jre-alpine"
dockerExposedPorts := Seq(8082)
dockerRepository := Some("bdesigns")
daemonUser in Docker    := "daemon"
//packageName in Docker := "server-akka"

dockerCommands ++= Seq(
  Cmd("USER", "root"),
  ExecCmd("RUN", "apk", "add", "--no-cache", "bash")
)

scriptClasspath in bashScriptDefines ~= (cp => "/etc/akka-server" +: cp)