addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.0.0-M1")
Native memory allocation (malloc) failed to allocate 715849728 bytes for committing reserved memory.

build.sbtに下記を追記する。

def creteEbextensions: Unit = {
  val directory = new File("target/docker/.ebextensions")
  val file = new File("target/docker/.ebextensions/env.config")
  val contents =
    """commands:
      |  01_enable_sudo:
      |    command: "echo Defaults:root !requiretty >> /etc/sudoers"
      |    test: "test ! -e /home/ec2-user/swapdone"
      |  02_dd:
      |    command: "sudo dd if=/dev/zero of=/swapfile bs=1M count=1024"
      |    test: "test ! -e /home/ec2-user/swapdone"
      |  03_mkswap:
      |    command: "sudo mkswap /swapfile"
      |    test: "test ! -e /home/ec2-user/swapdone"
      |  04_swapon:
      |    command: "sudo swapon /swapfile"
      |    test: "test ! -e /home/ec2-user/swapdone"
      |  05_swapdone:
      |    command: "touch /home/ec2-user/swapdone"
      |    test: "test ! -e /home/ec2-user/swapdone"
    """.stripMargin
  IO.createDirectory(directory)
  IO.write(file, contents)
}

(stage in Docker) <<= stage in Docker andFinally creteEbextensions