Ubuntu 18.04 Lightsail Image Coming?

It's great that there is a Plesk image on Lightsail, but I am concerned that it's Ubuntu 16.04, which has limited life left (despite its LTS status...much of its time has already passed).

Will there be an 18.04 image available soon on Lightsail?

Or is it possible to install the image and update Ubuntu to 18.04? I didn't know if there were any gotchas there.

Thank you.