Add cron to ubuntu packages (#3875)

install.sh

@@ -76,7 +76,7 @@ is_port_in_use() {
 install_base() {
     case "${release}" in
         ubuntu | debian | armbian)
-            apt-get update && apt-get install -y -q curl tar tzdata socat ca-certificates
+            apt-get update && apt-get install -y -q cron curl tar tzdata socat ca-certificates
         ;;
         fedora | amzn | virtuozzo | rhel | almalinux | rocky | ol)
             dnf -y update && dnf install -y -q curl tar tzdata socat ca-certificates