I'm a huge fan of running web servers in the house - but they don't have to be connected to the Internet to be useful and fun! An Apache instance on my always-on box in the basement [0] serves an incredible number of uses and can be connected to from any computer-like thing on my home network. Old-school CGI scripts can be written almost as quickly as terminal scripts and HTML forms make super quick interfaces. A home web server is probably STILL the easiest way to get files to heterogeneous computers and phones and tablets and...
[0] https://ratfactor.com/setup2