build gcp image

gcp-configuration.nix

@@ -0,0 +1,33 @@
+{ pkgs, lib, modulesPath, ... }: {
+  imports = [ "${modulesPath}/virtualisation/google-compute-image.nix" ];
+
+  config = {
+    system.stateVersion = "23.11";
+    boot.kernel.sysctl."net.ipv4.ip_forward" = true;
+
+    networking.nameservers = [ "8.8.8.8" ]; # Todo: include? "169.254.169.254"];
+
+    virtualisation.containers.enable = true;
+    virtualisation.docker = {
+      enable = true;
+      autoPrune.enable = true;
+    };
+
+    nix = {
+      settings.auto-optimise-store = true;
+      extraOptions = ''
+        experimental-features = nix-command flakes
+        min-free = ${toString (100 * 1024 * 1024)}
+        max-free = ${toString (1024 * 1024 * 1024)}
+      '';
+      gc = {
+        automatic = true;
+        dates = "weekly";
+        options = "--delete-older-than 60d --max-freed $((1024**3))";
+      };
+    };
+
+    services.openssh.settings.PasswordAuthentication = false;
+
+  };
+}