[ipaddr]

You need a browser and a file. In your example you need a server to make the file and and a browser.

[omn1]

True, but for others to resolve the calendar entries you'd need to serve that file somewhere.

[stoplying1]

/me glances at serverless in the title. Man, I would not want to have to technically design anything with you. You can't just say a thing is something and then say "oh well it's not actually but it could've been if I had made it entirely differently." ...