colmena initial implementation for sandbox and monitor

hive.nix

@@ -0,0 +1,48 @@
+inputs @ {
+  self,
+  nixpkgs,
+  sops-nix,
+  # home-manager,
+  overlays,
+  ...
+}: {
+  meta = {
+    nixpkgs = import nixpkgs {
+      system = "x86_64-linux";
+    };
+    specialArgs.flakeInputs = inputs;
+  };
+
+  defaults = {
+    pkgs,
+    lib,
+    name,
+    nodes,
+    meta,
+    config,
+    ...
+  }: {
+    imports = [
+      ./machines/_default
+      ./machines/modules
+      sops-nix.nixosModules.sops
+      # home-manager.nixosModules.home-manager
+    ];
+    nixpkgs = {
+      inherit overlays;
+      system = lib.mkDefault "x86_64-linux";
+      config.allowUnfree = true;
+    };
+    deployment.tags = [config.nixpkgs.system name];
+  };
+
+  sandbox = {name, ...}: {
+    imports = [./machines/${name}/definition.nix];
+    deployment.tags = ["sandbox"];
+  };
+
+  monitor = {name, ...}: {
+    imports = [./machines/${name}/definition.nix];
+    deployment.tags = ["grafana" "prometheus"];
+  };
+}