bert: Add owntracks-recorder

bert/configuration.nix

@@ -9,6 +9,7 @@
       ./services/monitoring.nix
       ./services/forgejo.nix
       ./services/navidrome.nix
+      ./services/owntracks-recorder.nix
     ];
 
   # Bootloader

bert/services/owntracks-recorder.nix

@@ -0,0 +1,19 @@
+{pkgs, ...}:
+let # off my branch until https://github.com/NixOS/nixpkgs/pull/373934 is merged
+  package = (import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/7ebad821473c78c7cfdf17ecf9f9be91d2455d81.tar.gz") {}).owntracks-recorder;
+in
+{
+  systemd.services.owntracks-recorder = {
+    enable = true;
+    description = "owntracks-recorder Service";
+    wantedBy = [ "multi-user.target" ];
+    after = [ "network.target" ];
+    serviceConfig = {
+      ExecStart = "${package}/bin/ot-recorder --storage /var/lib/owntracks --port 0";
+      DynamicUser = true;
+      StateDirectory = "owntracks";
+      StateDirectoryMode = "0775";
+      WorkingDirectory = "/var/lib/owntracks";
+    };
+  };
+}