Git sign by default, hostname from common.nix in flake.nix

flake.nix

@@ -37,7 +37,6 @@
     }:
     let
       system = "x86_64-linux";
-      hostname = "nixos";
       inherit (self) outputs;
       common = import ./common.nix;
     in
@@ -47,7 +46,7 @@
       # Adds the nix fmt command to format nix files
       formatter.${system} = nixpkgs.legacyPackages.${system}.nixfmt-rfc-style;
 
-      nixosConfigurations.${hostname} = nixpkgs.lib.nixosSystem {
+      nixosConfigurations.${common.hostname} = nixpkgs.lib.nixosSystem {
         system = system;
         specialArgs = { inherit outputs inputs; }; # Pass args to modules
         modules = [

home-manager/development/git.nix

@@ -10,6 +10,11 @@
       s = "status";
     };
 
+    signing = {
+      signByDefault = true;
+      key = "706F53DD087A91DE";
+    };
+
     extraConfig = {
       push.autoSetupRemote = true;
       safe.directory = "/etc/nixos";