fix(headscale): build custom config to update it to alpha

devices/cluster/modules/headscale/default.nix

@@ -6,19 +6,14 @@
   ...
 }: let
   inherit (builtins) readFile;
-  inherit (lib) mkAfter mkOption;
+  inherit (lib) mkAfter mkForce;
+  inherit (pkgs.writers) writeYAML;
 
   inherit (config.vars) mainUser hostName;
   headscale-flake = headscale.packages.${pkgs.system}.headscale;
 
   clusterIP = config.services.pcsd.virtualIps.caddy-vip.ip;
 in {
-  # FIXME: wait for nixpkgs to reach this : https://github.com/juanfont/headscale/commit/94b30abf56ae09d82a1541bbc3d19557914f9b27
-  options.services.headscale.settings.db_type = mkOption {
-    type = lib.types.enum ["sqlite" "postgres"];
-  };
-
-  config = {
   environment.systemPackages = [headscale-flake];
   users.users.${mainUser}.extraGroups = ["headscale"];
 
@@ -28,21 +23,29 @@ in {
   services.headscale = {
     enable = true;
     package = headscale-flake;
+  };
 
-      address = clusterIP;
-      port = 8085;
-
-      settings = {
+  environment.etc."headscale/config.yaml".source = mkForce (
+    writeYAML "headscale.yaml" {
       server_url = "https://headscale.nelim.org";
-        ip_prefixes = ["100.64.0.0/10"];
+      listen_addr = "${clusterIP}:8085";
+      prefixes = {
+        v4 = "100.64.0.0/10";
+        v6 = "fd7a:115c:a1e0::/48";
+      };
       metrics_listen_addr = "127.0.0.1:9090";
       grpc_listen_addr = "0.0.0.0:50443";
       grpc_allow_insecure = false;
       disable_check_updates = true;
+      ephemeral_node_inactivity_timeout = "30m";
+      unix_socket = "/run/headscale/headscale.sock";
       unix_socket_permission = "0770";
 
-        db_type = "sqlite";
-        db_path = "/var/lib/headscale/db.sqlite";
+      database = {
+        type = "sqlite";
+        sqlite.path = "/var/lib/headscale/db.sqlite";
+      };
+
       private_key_path = "/var/lib/headscale/private.key";
       noise.private_key_path = "/var/lib/headscale/noise_private.key";
 
@@ -57,8 +60,14 @@ in {
         nameservers = [caddyIp];
       };
 
+      log = {
+        format = "text";
+        level = "info";
+      };
+
       derp = {
-          urls = [];
+        auto_update_enable = true;
+        update_frequency = "24h";
 
         server = {
           enabled = true;
@@ -70,7 +79,6 @@ in {
           region_name = "montreal";
         };
       };
-      };
-    };
-  };
+    }
+  );
 }