Last week I got my third Raspberry Pi. My first being ordered at 5am on launch day. Currently the original Pi runs a static HTML site via Lighttpd and Squid proxy. The second Pi, a Pi 3 B+, runs Home Assistant. The third, a Pi 4 4GB, is currently being setup with Docker running, PiHole (replacing running it as part of Home Assistant), Squid proxy (replacing the Pi1), this site on Ghost, and an ELK stack for logs. A container running Caddy then acts to proxy port 80 and 443 traffic to the correct containers.
Hopefully I'll write some tutorials on how it all works soon.