try to enable docker mirro / dependency proxy

.gitlab/ci_scripts/create_vps.sh

@@ -17,4 +17,7 @@ python3 -m openappstack $HOSTNAME create \
   --create-domain-records \
   --subdomain $SUBDOMAIN \
   --disk-image-id '-7473' \
-  --truncate-subdomain
+  --truncate-subdomain \
+  --docker-mirror-endpoint='${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}' \
+  --docker-mirror-username='${CI_DEPENDENCY_PROXY_USER}' \
+  --docker-mirror-password='${CI_DEPENDENCY_PROXY_PASSWORD}'