FOSS alternative to Google Keep

Yes, I know that the are dozens of notes apps. I'm looking for recommendations based on a few features that I like:

• nice design (including color coding)
• easy checklists
• sharing - this one is key. I use a shared shopping list and we both need to add and edit.
• pinning and archiving (hidden notes)

I don't mind running it from my homelab server, but that is not a requirement. Does anyone use a notes app that you love? Let me know!