first basic config for nixos-anywhere

configuration.nix

@@ -0,0 +1,36 @@
+{ pkgs, ... }:
+
+{
+  system.stateVersion = "26.05";
+
+  networking.hostName = "server";
+
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  services.openssh = {
+    enable = true;
+
+    settings = {
+      PasswordAuthentication = false;
+      PermitRootLogin = "prohibit-password";
+    };
+  };
+
+  networking.firewall = {
+    enable = true;
+
+    allowedTCPPorts = [
+      22
+      80
+      443
+    ];
+  };
+
+  environment.systemPackages = with pkgs; [
+    git
+    vim
+    curl
+    wget
+  ];
+}

disko.nix

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+{
+  disko.devices = {
+    disk = {
+      main = {
+        device = "/dev/sda";
+
+        type = "disk";
+
+        content = {
+          type = "gpt";
+
+          partitions = {
+            ESP = {
+              size = "512M";
+
+              type = "EF00";
+
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+              };
+            };
+
+            root = {
+              size = "100%";
+
+              content = {
+                type = "filesystem";
+                format = "ext4";
+                mountpoint = "/";
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}

flake.nix

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+{
+  description = "Hetzner NixOS vps";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
+
+    disko = {
+      url = "github:nix-community/disko";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    nixos-anywhere.url = "github:numtide/nixos-anywhere";
+
+    home-manager = {
+      url = "github:nix-community/home-manager/release-26.05";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, disko, home-manager, ... }:
+  {
+    nixosConfigurations.server = nixpkgs.lib.nixosSystem {
+      system = "x86_64-linux";
+
+      modules = [
+        disko.nixosModules.disko
+        ./disko.nix
+        ./configuration.nix
+        ./users.nix
+
+        home-manager.nixosModules.home-manager
+
+        {
+          home-manager.users.root = import ./home.nix;
+        }
+      ];
+    };
+  };
+}

home.nix

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+{
+  home.stateVersion = "26.05";
+
+  programs.bash.enable = true;
+}

users.nix

@@ -0,0 +1,7 @@
+{
+  users.users.root = {
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIC6WNm4YAQO85j0aNQkKSH7QnmhgzKA4hA2ggi6cDyKk"
+    ];
+  };
+}