Com, net and org -self hosted

Hi! Sorry 4 the beginner question, was wondering if there is a proper way to point 3 domains, the com net and org all to a single blog. Does this have anything to do with the canonical feature? I am aware of ngnix basic server config, but ghost i notice has an ssl version and a non ssl version of sites. If I were to make an nginx config file for the com , and just point it to a reverse proxy of the correct port, then run letsencrypt to get ssl, would that be the best way to point the com to an existing blog? I assume that would have to be done manually for each domain I want to point to the same blog? Thanks in advance for answers. Im just wondering if there is a best way to point a self hosted ghost blog to com, net and org domains.