We have quite a few customers that use their Mac minis as a file server. Searchlight gives you the ability of Spotlight search thru the web.
When you start Searchlight, there are just a few choices you have to make before your server is live. This includes which files you’d want to share. Then you start the server. It runs on port 9000.
Once the server is started, you can point a browser on your Mac, PC or iPhone and search all of your files. It also allows for a Quick Look so you can have a preview of the file.
You can learn more and download the app here.