pgAdmin docker - password reset not working

Hi there, 

I have been looking at the dbpage/pgadmin4 docker repo and we noticed that the password reset features don't work out of the box, I have been able to fix this by just adding a postfix server but I was wondering if this was intended or not?

I believe something like that should work out of the box whether that be adding an environment variable to set up a mail relay or just using a default postfix server.

Cheers,

Kartik.