CI: Download config.json file

Change-Id: I2524baf25d26a03e2cfab9d4efdd33df95e89abf
diff --git a/ci-dockerfiles-deployment/builders.sh b/ci-dockerfiles-deployment/builders.sh
index 0cfd7a5..e4f58e0 100644
--- a/ci-dockerfiles-deployment/builders.sh
+++ b/ci-dockerfiles-deployment/builders.sh
@@ -11,6 +11,7 @@
 }
 
 mkdir -p ${HOME}/.docker
+wget https://ci.trustedfirmware.org/userContent/config.json
 sed -e "s|\${DOCKER_AUTH}|${DOCKER_AUTH}|" < ${WORKSPACE}/config.json > ${HOME}/.docker/config.json
 chmod 0600 ${HOME}/.docker/config.json