Just another "update" to my previous posts; I'm trying to drum up a bit of interest in the topic from anyone who might like to run their own home server in spite of not having a domain or a static IP address, as detailed at
Dynamic_DNS_Client on Debian wiki.
By the way, there's an Eben Moglen video about,
"The Story of FreedomBox(2019)" from the FreedomBox Foundation. (For some background, see also
Bulkley's
topic: Why Freedom of Thought Requires Attention):
This is a story a bout a group of dedicated citizens who created a software tool that empowers people to reclaim the internet.
The story begins at 7:00 p.m. on Friday, February 5th, 2010 in a lecture hall at New York University in Lower Manhatten.
Edward Moglen was invited to speak about "the cloud," an emerging network of centralised servers controlled by big tech companies.
With no cost at all, you get to use a subdomain with an address like example.freedombox.rocks which you can then obtain a Letsencrypt certificate for, if you so wish, and the server address, even though it's hosted at a dynamic IP address, gets updated using an update URL.
I've got everything up and running but I did have a few glitches on the way. Amost any old computer running Debian Buster connected to the router would work too with the caveat that it is recommended to install the software on a fresh Debian installation but, as I mentioned, before I'm using the Raspberry Pi 2.
I moved the files system over to the external disk to avoid using the tiny 8 Giga SD card in the Pi.
Here's the what my present "proof-of-concept" Freedom Box looks like:

What can you do with this home server? All sorts of wonderful things:
FreedomBox is a private server system that empowers regular people to host their own internet services, like a VPN, a personal website, file sharing, encrypted messengers, a VoIP server, a metasearch engine, and much more. It is designed to be secure, flexible, and simple. FreedomBox builds freedom into the internet by putting you in control of your activity and data on the net.
Quote from:
here
"Please accept my resignation. I don’t care to belong to any club that will have me as a member".—Groucho Marx