Set app domain if not given

src/freedombone-installer

@@ -811,6 +811,9 @@ function install_apps_from_webadmin {
             app_name=$(echo "$linestr" | awk -F '_' '{print $2}' | awk -F ',' '{print $1}')
             if [ -f "/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-${app_name}" ]; then
                 app_domain=$(echo "$linestr" | awk -F ',' '{print $2}')
+                if [ ! "$app_domain" ]; then
+                    app_domain=${app_name}.local
+                fi
                 app_name_upper=$(echo "$app_name" | awk '{print toupper($0)}')
                 freedns_code=$(echo -n "$linestr" | awk -F ',' '{print $3}')