Were you running a docker image on custom VMs on app engine? Just wondering how easy the transition was. Are you still running on Google cloud instances via nanobox?
i was using flex python 3 engine, not custom.
I am not running on GCP anymore, I switched to Linode because it's cheaper ($5 instance) and deployed using nanobox.
I deployed to app engine using app engine deployment, Linode using nanobox