Add inputs to flake, remove unnecessary boilerplate

server-config/flake.nix

@@ -8,11 +8,8 @@
   outputs = inputs@{ nixpkgs, ... }:
     {
       nixosConfigurations.linode-nixos =
-        let
-          system = "x86_64-linux";
-          pkgs = nixpkgs.legacyPackages.${system};
-        in
         nixpkgs.lib.nixosSystem {
+          specialArgs = { inherit inputs; };
           modules = [
             ./configuration.nix
           ];