readme update

README.md

@@ -73,3 +73,12 @@ nixos-rebuild switch --flake git+https://gitea.john-stream.com/john/ad-nix#ad-ni
 `secrets/secrets.yaml` needs to have
 
 - `telegraf_influx_token`
+
+### Tailscale
+
+Needs this in the `/etc/pve/lxc/<vmid>.conf` file on the proxmox host.
+
+```
+lxc.cgroup2.devices.allow: c 10:200 rwm
+lxc.mount.entry: /dev/net/tun dev/net/tun none bind,create=file
+```