Create working Hetzner NixOS install

.gitignore

@@ -5,3 +5,4 @@
 *.tfstate.backup
 *.tfstate.*.backup
 .terraform.lock.hcl
+result

README.md

@@ -1,6 +1,6 @@
 # OpenTofu server configuration
 
-This is an experimental configuration for my Hetzner VPS using OpenTofu and Nix.
+This is an experimental configuration for my Hetzner VPS using OpenTofu and Nix, based on [NixOS/nixos-wiki-infra on Github](https://github.com/NixOS/nixos-wiki-infra).
 
 ## How to use
 
@@ -8,5 +8,10 @@ Copy `.env.example` to `.env` and fill in the values.
 
 To generate a token with Hetzner, go to the project and click `Security -> API Tokens`.
 
-Run `nix develop` to access a shell where OpenTofu is accessible.
+For cross-compiling, you will need to add a builder by visiting the following resources:
+- https://nix.dev/tutorials/nixos/distributed-builds-setup.html
+- https://nix.dev/manual/nix/2.25/advanced-topics/distributed-builds
 
+Run `nix develop` at the root of the project directory to access a shell where OpenTofu is accessible.
+
+In the `targets` directory, go to the system and run the corresponding shell files to make modifications.

targets/vpn/configuration.nix

@@ -12,11 +12,14 @@ in
   imports = [
     self.nixosModules.hcloud
   ];
-  users.users.root.openssh.authorizedKeys.keys = nixosVars.ssh_keys;
+  users.users.root = {
+    openssh.authorizedKeys.keys = nixosVars.ssh_keys;
+    initialPassword = "nixos";
+  };
   system.stateVersion = "23.11";
 
   networking = {
-    hostName = "vpn";
+    hostName = "nixos-vpn";
   };
 
   services.openssh = {
@@ -24,7 +27,14 @@ in
     settings.PasswordAuthentication = false;
   };
 
+  services.cloud-init.enable = lib.mkForce false;
+
   boot.supportedFilesystems = ["btrfs"];
-  environment.systemPackages = [pkgs.btrfs-progs];
+  environment.systemPackages = [
+    pkgs.btrfs-progs
+    pkgs.shadow
+    pkgs.vim
+    pkgs.speedtest-cli
+  ];
 }