Fix build image (#180)

Author: yrong

scripts/build_image.sh

@@ -7,6 +7,8 @@ if [[ -z "$1" ]] ; then
     VERSION=$(git rev-parse --short HEAD)
 fi
 
+eval $(ssh-agent)
+ssh-add ~/.ssh/bifrost_id_rsa
 DOCKER_BUILDKIT=1 docker build --ssh default -t "$NODE_NAME:$VERSION" .
 docker push "$NODE_NAME:$VERSION"
 docker push $NODE_NAME:latest