tup proxies services on the local network to a remote gateway, all traffic between the remote server and the service on the local network is sent through a wireguard tunnel
think of tup as an open source and self-hosted alternative to ngrok and cloudflare tunnel
tupd (the server) can be found at: https://drive.proton.me/urls/GEJM1HT0DW#aOop4p7zxaPA
the tup client can be found at: https://drive.proton.me/urls/63SE9PW020#GFzZrprg9wjZ
Same thought here, why uploading it to proton drive? github isnt evil that they trying to snatch that code or whatever. If you are so cautious then ramp up a gitea or gitlab self hosted instance up.
You're right, OP. Just dumping it somewhere is acceptable. It doesn't make it very accessible for other people. But since you're not planning to maintain it or make it easy to use for other people... It's alright. Most important thing is to include a license file or it can't be used. But that's it.
If you want people to take you seriously about being open source, you need to have a git repo, like github, gitlab, etc. you can even self host one. Heck, you can even use a different (non git) DVCS, but not just a link to a cloud drive...