Well, unfortunately I did not succeed to use our phone company's infrastructure for properly hosting my website from home. Their fiber modem comes with various cyber protections and although it claims not to be operating under a firewall, it still seems to be. I was able to almost get NGINX to serve my pages without https, but the service seemed wonky, hit-or-miss and did not stabilize for the first 24 hours, at least. I don't want to give too much time to this, having already spent many hours getting things up and running with the old modem. Fiber is still a little new around here. Bezeq, the phone company, is trying its best to seal people in to its own service and does not allow one to use a non-Bezeq modem without using an adapter. Eventually I will probably find a freer ISP because there are competitors.
For now I'm able to use my Fastmail file storage to host this static site, but, for a couple of reasons that is not ideal. I will hunt around for a good and hopefully cheap virtual server as I also don't like being nannied by the hosting companies.