The Zeppelin NT is a zeppelin not a blimp because it has a solid structure inside (see FAQ “Zeppelin vs. Blimp”)

Maybe take a look at Diun or Watchtower

I use Diun and ntfy to get push notifications about new docker image versions on my smartphone. Other options include notifications for Discord, mail, MQTT, Slack, Webhook and more.

Guacamole offers SSH, RDP, VNC access by browser. Easy deployment via Docker. Straightforward and simple interface.

Same.