This tutorial introduces how to make Chrome accept self assigned ssl keys for websites:
https://www.systutorials.com/50204/making-chrome-accept-self-signed-certificates-on-linux/
However, on iPhone, Chrome blocks me from access sites with self assigned keys.
How to make Chrome on iPhone also accept the ssl keys?
At the time when I wrote this reply, there is no way to add Certificate Authorities to Chrome on iOS: