Here is the link with the instructions https://tech.anytype.io/how-to/self-hosting
Self-hosting only without a backup node is currently unavailable
The self-hosting-only feature is not released yet. If you don’t want to use Anytype node and instead use p2p sync between your devices, you can block Anytype network traffic (Anytype & Anytype Helper) via your firewall.
From https://doc.anytype.io/d/data-and-security/data-storage-and-...