As many have advised against it, I decided to start (almost self-)hosting my mail service.

Hello all! I have never selfhosted before, but I have a pretty extensive digital library of videogames (ROMs from a couple dozen retro systems among other executables) that my friends have expressed interested in having access. What’s the ideal software for giving them access to the library hosted on my drives? I’m picturing something like a selfhosted Steam where they see all of the games and can search via retro system, game tags, by name, etc. and each of could keep track of separate user accounts by playtime, favorites, recently played, etc. I use RetroArch and a few standalone emulators myself connected to RetroAchievements, so I figured they would need to download any emulators on their ends and then just pick and play the games as they see fit without having to have their own copies of the games.