many updates, new linode server

hosts/linode/l001/headscale.nix

@@ -0,0 +1,24 @@
+{ pkgs, ... }:
+{
+
+  config = {
+    # TODO backup /var/lib/headscale data
+    # TODO https://github.com/gurucomputing/headscale-ui ?
+    environment.systemPackages = with pkgs; [ headscale ];
+    services.headscale = {
+      enable = true;
+      settings = {
+        server_url = "https://nexus.joshuabell.xyz";
+        database.type = "sqlite3";
+        derp = {
+          auto_update_enable = true;
+          update_frequency = "5m";
+        };
+        dns = {
+          magic_dns = true;
+          base_domain = "net.joshuabell.xyz";
+        };
+      };
+    };
+  };
+}