FreedomeBox (freedombox.org) is such a software NAS as an image for one of the many Malinki single board computers. Allows you to raise the hosting for the site, and screw the wiki, and the messenger with a VPN server. In general, it is a quite suitable alternative to solutions from Synology or QNAP. Just advice right away - for speed, it is better to put the ssd disk either on a separate controller or use the RasPi4 version where the USB ports are hardware-wired with a network controller. The project is also monetized by selling a ready-made device.