Hi! Glad to see someone trial-ed the windows docker with Qlik Sense.
You are correct. Engine service indeed won't start in the Docker. I don't know why and never have the opportunity to ask Qlik Support either. My setup was a simple Windows 10 Docker (Win 2016 core) with Qlik Sense share persistence setup.
I'll definitely revisit this only if Qlik starts to support this type of configuration.