How can I install a self-signed star cert with a self-generated root CA that openssl will verify against?

I’m trying to test some services and they need to talk to each other over https ( and they can’t talk over http). I want to:

create a Root CA that I can install in my Ubuntu-based docker images
sign a subdomain cert like *.example.com su… Continue reading How can I install a self-signed star cert with a self-generated root CA that openssl will verify against?