packer: update build scripts, install SSH keys

packer/scripts/setup-ssh.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -euxo pipefail
+
+source /etc/os-release
+
+case "${ID}" in
+	ubuntu)
+		SYSTEM_USER=ubuntu
+		SYSTEM_HOME=/home/${SYSTEM_USER}
+		;;
+	*)
+		SYSTEM_USER=root
+		SYSTEM_HOME=/root
+		;;
+
+echo "[+] setting up ssh"
+apt-get -y install openssh-server
+
+SSH_DIR="${SYSTEM_HOME}/.ssh"
+mkdir -p ${SYSTEM_HOME}/.ssh
+chmod 0700 ${SSH_DIR}
+
+mv /tmp/authorized_keys ${SSH_DIR}/authorized_keys
+chmod 0644 ${SSH_DIR}/authorized_keys
+