CI: Update dockerfiles build job

Update the dockerfiles build job to use build-amd64 which is a EC2
container. We need to user a EC2 container because our jenkins master
runs inside docker, and we need to build a docker image.

Change-Id: I033ee365d1cf4267d4f1c8e3eb3f145b3d77d9a5
diff --git a/ci-dockerfiles-deployment.yaml b/ci-dockerfiles-deployment.yaml
index d1a2f04..8642b90 100644
--- a/ci-dockerfiles-deployment.yaml
+++ b/ci-dockerfiles-deployment.yaml
@@ -13,7 +13,7 @@
             days-to-keep: 90
             num-to-keep: 200
     disabled: false
-    node: master
+    node: build-amd64
     concurrent: false
     display-name: 'CI Dockerfiles build/publish deployment'
     scm:
diff --git a/ci-dockerfiles-deployment/config.json b/ci-dockerfiles-deployment/config.json
new file mode 100644
index 0000000..a60b52b
--- /dev/null
+++ b/ci-dockerfiles-deployment/config.json
@@ -0,0 +1,7 @@
+{
+        "auths": {
+                "https://index.docker.io/v1/": {
+                        "auth": "${DOCKER_AUTH}"
+                }
+        }
+}