diff --git a/scripts/deploy/bootstrap_orderbooks_k8s.sh b/scripts/deploy/bootstrap_orderbooks_k8s.sh
index a807022..fa95571 100755
--- a/scripts/deploy/bootstrap_orderbooks_k8s.sh
+++ b/scripts/deploy/bootstrap_orderbooks_k8s.sh
@@ -96,13 +96,18 @@ if [[ -z "${FORGEJO_TOKEN:-}" ]]; then
 fi
 
 if [[ -z "${REGISTRY_HOST:-}" ]]; then
-  if [[ -n "${REGISTRY_DOMAIN:-}" ]]; then
+  if [[ -n "${REGISTRY_DOMAIN:-}" && "${REGISTRY_DOMAIN}" != *'${'* ]]; then
     REGISTRY_HOST="$REGISTRY_DOMAIN"
   else
-    echo "missing registry host" >&2
-    exit 1
+    REGISTRY_HOST="registry.doran.133011.xyz"
   fi
 fi
+
+shared_registry_user="$(kubectl -n registry get secret registry-secrets -o jsonpath='{.data.htpasswd}' 2>/dev/null | base64 -d 2>/dev/null | cut -d: -f1 || true)"
+if [[ -n "$shared_registry_user" ]]; then
+  REGISTRY_USERNAME="$shared_registry_user"
+fi
+
 : "${REGISTRY_USERNAME:?missing registry username}"
 : "${REGISTRY_PASSWORD:?missing registry password}"