Currently I play around with a Raspi 4 8GB with docker-compose. Most services are accessible with VPN only:
Caddy (as easy reverse proxy)
Portainer (container dashboard)
Linkding (bookmarks)
Baikal (calendar, todo list to sync with Android by caldav)
Agendav (web calendar frontend)
Dillinger (browser markdown editor with PDF export)
Trilium (note app)
Syncthing (google drive/onedrive alternative)
Seafile (file sharing)
Jellyfin (media server)