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: I0fbe5273108a9c45b853e625459d95575643209a
diff --git a/docker_templates_amd64.yml b/docker_templates_amd64.yml
index 8fa4e96..9de19ad 100644
--- a/docker_templates_amd64.yml
+++ b/docker_templates_amd64.yml
@@ -31,3 +31,9 @@
   labels: 'docker-amd64-hafnium-bionic'
   launch_method: 'launch_ssh'
   ssh: !include docker_ssh_buildslave.yml
+
+- docker-amd64-alpine-10:
+  docker_image_name: 'trustedfirmware/ci-node-tf-a-alpine:alpine10'
+  labels: 'docker-amd64-node-alpine10'
+  launch_method: 'launch_ssh'
+  ssh: !include docker_ssh_buildslave.yml