seems to work

scripts/restore

@@ -66,7 +66,7 @@ ynh_restore_file --origin_path="/etc/logrotate.d/$app"
 # INTEGRATE SERVICE IN YUNOHOST
 ynh_script_progression --message="Integrating service in YunoHost..." --weight=1
 yunohost service add $app --description="A decentral federated small advertisement platform" --log="/var/log/$app/$app.log"
-ynh_systemd_action --action=start 
+ynh_systemd_action --action=start --line_match="INFO:     Application startup complete."
 
 # RELOAD NGINX
 ynh_script_progression --message="Reloading NGINX web server..." --weight=1