Automatically create hotspot in Ubuntu MATE - by: simingx

Hi all,
I installed the AstroPi3 build, and it seems to be working OK. How do I set up the Rpi so that it creates a hotspot if it does not connect to an access point (e.g. outdoors away from home)?
The shortcuts for creating the hotspot are there, I'm just not sure how to run them automatically.
Thanks!