[stable/zed] Add missing noVNC (#1099)

diff --git a/images/nova/Dockerfile b/images/nova/Dockerfile
index 36961bf..7f4a9dd 100644
--- a/images/nova/Dockerfile
+++ b/images/nova/Dockerfile
@@ -23,6 +23,7 @@
 EOF
 
 FROM registry.atmosphere.dev/library/openstack-python-runtime:zed
+ADD https://github.com/novnc/noVNC.git#v1.4.0 /usr/share/novnc
 RUN <<EOF bash -xe
 apt-get update -qq
 apt-get install -qq -y --no-install-recommends \