Add mailserver host

hosts/mail/default.nix

@@ -0,0 +1,53 @@
+{ config, lib, pkgs, inputs, ... }:
+
+{
+  imports = [
+    ./hardware-configuration.nix
+    ./disko-config.nix
+    ../server.nix
+  ];
+
+  networking = {
+    hostId = "08ac2f14";
+    domain = "mesh.vimium.net";
+    firewall = {
+      enable = true;
+      allowedTCPPorts = [
+        22    # SSH
+      ];
+    };
+  };
+
+  users = {
+    users = {
+      root = {
+        openssh.authorizedKeys.keys = [
+          "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILVHTjsyMIV4THNw6yz0OxAxGnC+41gX72UrPqTzR+OS jordan@vimium.com"
+        ];
+      };
+    };
+  };
+
+  services.openssh.settings.PermitRootLogin = lib.mkForce "prohibit-password";
+
+  security.acme.defaults = {
+    email = "hostmaster@vimium.com";
+    group = "nginx";
+    webroot = "/var/lib/acme/acme-challenge";
+  };
+
+  modules = {
+    services = {
+      borgmatic = {
+        enable = true;
+        directories = [
+          "/var/lib"
+        ];
+        repoPath = "ssh://kg2mpt28@kg2mpt28.repo.borgbase.com/./repo";
+      };
+      mail.enable = true;
+    };
+  };
+
+  system.stateVersion = "22.11";
+}