Selfhosted
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
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If you only need it to be accessible inside your home, then you just need to run your own DNS. Have your dhcp point at your DNS and your DNS declare itself the master for your domain.
To get full functionality, you'll probably want to have your registrar point to the public IP you get from your ISP as the domain's authoritative name server.You should be able to script it to update the registrar when your ISP changes your IP, but that usually happens infrequently enough to do manually. Obviously can't do that if you're behind CGNAT.
To get Lets Encrypt certificates, you can do the DNS challenge. If your ISP gives you a (even inconsistent) public IP, you can do fancy 'views' with your selfhosted DNS, where it responds with private IPs inside your network and your ISP-given IP outside your network. I have certbot set up to expose my DNS & web server just before it starts its renewal process, then close the firewall after. Once you have the certificate, you can move it to where ever it will actually be used.