feat: add mailserver

Signed-off-by: Lander Van den Bulcke <landervandenbulcke@gmail.com>

hosts/common/servers/default.nix

@@ -0,0 +1,56 @@
+{ inputs, pkgs, ... }:
+{
+  imports = [
+    inputs.disko.nixosModules.disko
+
+    ../global/sops.nix
+
+    ./hetzner.nix
+  ];
+
+  programs.zsh.enable = true;
+  environment.pathsToLink = [ "/share/zsh" ];
+  environment.shells = [ pkgs.zsh ];
+
+  environment.enableAllTerminfo = true;
+
+  users.users.lander = {
+    isNormalUser = true;
+    shell = pkgs.zsh;
+    extraGroups = [
+      "wheel"
+    ];
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPnthKtz0fE4yQ/X10cJgKVCjYCNkRNoqV28xAhD7h2M cardno:22_498_026"
+    ];
+  };
+
+  nix = {
+    settings = {
+      trusted-users = [ "lander" ];
+
+      accept-flake-config = true;
+      auto-optimise-store = true;
+    };
+
+    registry = {
+      nixpks = {
+        flake = inputs.nixpkgs;
+      };
+    };
+
+    nixPath = [
+      "nixpkgs=${inputs.nixpkgs.outPath}"
+      "nixos-config=/etc/nixos/configuration.nix"
+      "/nix/var/nix/profiles/per-user/root/channels"
+    ];
+
+    package = pkgs.nixVersions.stable;
+    extraOptions = ''experimental-features = nix-command flakes'';
+
+    gc = {
+      automatic = true;
+      options = "--delete-older-than 7d";
+    };
+  };
+}

hosts/common/servers/hetzner.nix

@@ -0,0 +1,28 @@
+{ modulesPath, ... }:
+{
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+    (modulesPath + "/profiles/qemu-guest.nix")
+  ];
+
+  boot.loader.grub = {
+    devices = [ "/dev/sda" ];
+    efiSupport = true;
+    efiInstallAsRemovable = true;
+  };
+
+  boot.initrd.kernelModules = [ "virtio_gpu" ];
+  boot.kernelParams = [ "console=tty" ];
+
+  services.openssh = {
+    enable = true;
+    settings.PasswordAuthentication = false;
+    extraConfig = ''
+      PrintLastLog no
+    '';
+  };
+
+  users.users.root.openssh.authorizedKeys.keys = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPnthKtz0fE4yQ/X10cJgKVCjYCNkRNoqV28xAhD7h2M cardno:22_498_026"
+  ];
+}