Fix some networking issues and setup a second nomad host

1-nixos-node/0-install-nixos.md

@@ -1,8 +1,13 @@
 Follow steps at https://nixos.org/manual/nixos/stable/#sec-installation-manual-summary
 
-Ensure that ssh is enabled and the hostname is set
+Note: run `lsblk` to determine correct device to install to.
+
+Set the hostname when editing `/mnt/etc/nixos/configuration.nix` before the installation:
+`networking.hostName = "jaglan-beta-mNN";`
+
+Once `nixos-install` is complete and the root password is set and saved edit the `/etc/nixos/configuration.nix` again to enable ssh and run `nixos-rebuild switch`
+
 ```
 services.openssh.enable = true;
 services.openssh.settings.PermitRootLogin = "yes";
-networking.hostName = "jaglan-beta-m01";
-```
+```