Mount the NFS server on the compute nodes

We now need to make the compute nodes mount the NFS server.

To do this, we will also disable the firewall and create a new mounting point (/data in our case):

node = { pkgs, ... }:
{
  # add needed package
  environment.systemPackages = with pkgs; [ openmpi ior ];

  # Disable the firewall
  networking.firewall.enable = false;

  # Mount the NFS
  fileSystems."/data" = {
    device = "server:/";
    fsType = "nfs";
  };
};