Node: Add node image

This commit adds support for node.js into our docker infra. It uses
alpine, and is based of
https://hub.docker.com/_/node.

Signed-off-by: Benjamin Copeland <ben.copeland@linaro.org>
Change-Id: Ie2322c27fd259b021b14a3363c1fa2657ef98701
diff --git a/alpine10-node-tf-a/setup-sshd b/alpine10-node-tf-a/setup-sshd
new file mode 100755
index 0000000..b0a5ed5
--- /dev/null
+++ b/alpine10-node-tf-a/setup-sshd
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+export HOME=/home/buildslave
+
+[ -z "${JENKINS_SLAVE_SSH_PUBKEY}" ] || {
+  mkdir ${HOME}/.ssh
+  echo "${JENKINS_SLAVE_SSH_PUBKEY}" > ${HOME}/.ssh/authorized_keys
+  chown -R buildslave:buildslave ${HOME}/.ssh
+  chmod 0700 -R ${HOME}/.ssh
+}
+
+exec /usr/sbin/sshd -D