feat: Add anvil's config

crossbox.nix

@@ -0,0 +1,53 @@
+{ config, pkgs, ... }:
+
+{
+  networking.hostName = "crossbox";
+  system.stateVersion = "25.11";
+  networking.firewall.allowedTCPPorts = [ 22 ];
+  services.pulseaudio.enable = false;
+
+  hardware.graphics = {
+    enable = true;
+    extraPackages = with pkgs; [
+      rocmPackages.clr.icd # ROCm OpenCL runtime
+      rocmPackages.clr
+      rocmPackages.rocminfo
+      rocmPackages.rocm-runtime
+    ];
+  };
+
+  # List services that you want to enable:
+  services.openssh = {
+    enable = true;
+    settings = {
+      PermitRootLogin = "no";
+      PasswordAuthentication = false;
+      KbdInteractiveAuthentication = false;
+    };
+  };
+
+  # Disable automatic suspend.
+  # Otherwise SSH tunnels and HDMI signals break.
+  services.logind = {
+    settings = {
+      Login = {
+        HandleLidSwitch = "ignore";
+	HandleHibernateKey = "ignore";
+	HandleSuspendKey = "ignore";
+	HandlePowerKey = "ignore";
+      };
+    };
+  };
+
+  virtualisation.docker = {
+    enable = true;
+    autoPrune = {
+      enable = true;
+      dates = "weekly";
+    };
+    rootless = {
+      enable = true;
+      setSocketVariable = true;
+    };
+  };
+}