Hi,
The first thing : thank you to the agola team for this project. 
As I commented in this issue, I wrote a helm chart for the agola deployment in distributed mode.
It works fine for me actually in two k3s clusters (I will migrate my pipelines to agola this week-end).
I think it’s just missing a post-upgrade helm hook to automaticaly upgrade the databases with the agola migrate cmd.
Well, let me known when you integrate an official helm chart, of course, I will remove my repository.
Feel free to copy or rewrite this helm chart.