Hi, I got a small server as a for-fun-project and I really enjoy having it. With all the stuff going on in the world I would like to self host more things, but I'm pretty new to the scene. So far it's just an old desktop with Ubuntu server os acting as media server. I would like to add some sort of lightweight and preferably open source file share akin to Google Drive with the ability to save/upload, view and edit files on the server from the outside internet. I'd also like a shared calendar that can also be accessed from the internet. Do you have any good recommendations this? Thanks