Self-hosting

Hi!

I'm supplying a small camp I'm participating in with Internet/Wifi, so I built an x86 OpenWRT router with an LTE modem... it took forever, but now it's working. (camp is quite outback for open wifi routers) So now I thought: What if we could share files for... anything easily via the router without setting up SAMBA on their phones or whatever.

So I thought of services like Sharedrop, or drop.lol, or litterbox.moe or pastebin or whatever. And that it would be super convenient to fileshare without the Internet or whatever.

There are a lot of self-hosted options available but which ones run on that 8GB OpenWRT router I set up. (Should be easy - that's a powerhouse for writeaple drive space in a router.

So: what's the best idea here? I can set up a http server, but I guess an ftp server would work as well. Althoug it would be perfect if it worked with phones and ad-hoc filesharing (download and upload, preferably with QR-code generation).

I know stuff like magic wormhole or localsend or warp, but all of those are a bit of a hassle for noobs to setup (i.e.: opening a firewall, which you shouldn't do if you don't know what you're doing). That's why I was thinking: hosted in the router.

You got any ideas what I can run on my potato of a server/beefcake of a router?