added for vps

hosts/server/configuration.nix

@@ -0,0 +1,57 @@
+{
+  config,
+  lib,
+  pkgs,
+  modulesPath,
+  ...
+}: {
+  imports = [
+    (modulesPath + "/profiles/qemu-guest.nix")
+    ./disk-config.nix
+  ];
+
+  boot.loader.grub = {
+    enable = true;
+  };
+
+  boot.initrd.availableKernelModules = ["xen_blkfront" "virtio_blk"];
+
+  networking = {
+    hostName = "alteur";
+    useDHCP = false;
+    interfaces.enX0.ipv4.addresses = [
+      {
+        address = "redacted";
+        prefixLength = 24;
+      }
+    ];
+    defaultGateway = "redacted";
+    nameservers = ["8.8.8.8" "8.8.4.4"];
+  };
+
+  services.openssh = {
+    enable = true;
+    ports = [8123];
+    settings = {
+      PermitRootLogin = "prohibit-password";
+      PasswordAuthentication = false;
+    };
+  };
+
+  users.users.root.openssh.authorizedKeys.keys = [
+    "redacted"
+  ];
+
+  environment.systemPackages = with pkgs; [
+    curl
+    git
+    htop
+  ];
+
+  networking.firewall = {
+    enable = true;
+    allowedTCPPorts = [8123 80 443];
+  };
+
+  system.stateVersion = "25.05";
+}