Introduce colmena config and add shairport-sync host

flake.nix

@@ -3,6 +3,8 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-23.05";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
+
     # Add nixos-generators as an input.
     # See here: https://github.com/nix-community/nixos-generators#using-in-a-flake
     nixos-generators = {
@@ -11,7 +13,29 @@
     };
   };
 
-  outputs = { nixpkgs, nixos-generators, ... }: {
+  outputs = { nixpkgs, nixpkgs-unstable, nixos-generators, ... }: {
+    colmena = {
+      meta = {
+        nixpkgs = nixpkgs.legacyPackages."x86_64-linux";
+        nodeNixpkgs = {
+          audio = nixpkgs-unstable.legacyPackages."x86_64-linux";
+        };
+      };
+
+      audio = {
+        deployment = {
+          targetHost = "audio.z9.ccchh.net";
+          targetPort = 22;
+          targetUser = "chaos";
+        };
+        imports = [ 
+          ./config/common
+          ./config/proxmox-vm
+          ./config/hosts/audio
+        ];
+      };
+    };
+
     packages.x86_64-linux = {
       proxmox = nixos-generators.nixosGenerate {
         system = "x86_64-linux";