I've been happy with my Synology DS218+ as well. I use it to host some Docker containers for home automation and some other things, both with and without Docker

I've been happy with my Synology DS218+ as well. I use it to host some Docker containers for home automation and some other things, both with and without Docker compose (need to use the CLI to get compose working). The one thing that burned me recently is DSM version 7 removed support for any USB device that's not a mass storage device. This effectively kills a lot of what I love about the Synology. Next time I'll probably roll my own.