Add option to add labels to Kubernetes nodes

Make nextcloud always go to nodes with fast storage
Don't mount nextcloud on syncthing pod

machines/atlas.nix

@@ -1,6 +1,7 @@
 {
   machines.atlas = {
     arch = "x86_64-linux";
+    kubernetesNodeLabels.storageType = "slow";
 
     nixosModule.lab = {
       storage = {

machines/default.nix

@@ -22,6 +22,14 @@ let
           Customized configuration for this machine in the form of a NixOS module.
         '';
       };
+
+      kubernetesNodeLabels = lib.mkOption {
+        default = null;
+        type = with lib.types; nullOr attrs;
+        description = ''
+          Any labels to add to the Kubernetes node.
+        '';
+      };
     };
   };
 in

machines/jefke.nix

@@ -1,6 +1,7 @@
 {
   machines.jefke = {
     arch = "x86_64-linux";
+    kubernetesNodeLabels.storageType = "fast";
 
     nixosModule.lab = {
       storage = {