Can you clarify something about self-hosting for me please. If I want to collaborate with other people on self-hosted a git repo, do I need to have a static IP or a router device that is compatible with services like noip, and open up ports which opens up my local network to constant attacks from outside it?

Every time this is brought up someone has to remind people that printers watermark whatever they print with a unique ID in barely readable type. That’s, for example, why they refuse to print something in black when yellow is low. And it’s a legal requirement.