Add default ntp configuration

[RegisHubelia]

Currently, when the system boots after install, ntp is not configured.

I added the following in the config file and it works fine:

write_files:

• container: ntp path: /etc/ntp.conf permissions: "0644" owner: root content: | server 1.pool.ntp.org iburst server 0.pool.ntp.org iburst

  restrict default nomodify nopeer noquery limited kod restrict 127.0.0.1 restrict [::1] runcmd:

• timedatectl set-ntp true

But I would suggest to have a default configuration as time sync problem sometime causes underlying issues.