[Tomaž] uses the “hello world” example from ESP8266WebServer to explain. In it, the main loop essentially consists of calling server.handleClient() forever.

Your server has a single IP address, and multiple aliases (CNAMES) point to this machine in DNS. You want to run a web server for www.example.com and www.example.org on this machine.

Assign the libref and the Web-server path. FILENAME assigns the fileref ODSOUT, which is a destination for the HTML and GIF files produced by the example program. To assign that location as the HTML ...