open-webui: use unstable nixpkgs package on alexandria

aspects/hosts/_alexandria/open-webui.nix

@@ -0,0 +1,27 @@
+{ lib, config, inputs, ... }:
+let
+  mkNginxVHosts = inputs.self.lib.mkNginxVHosts;
+in
+{
+  nixpkgs.overlays = [
+    (final: prev: {
+      open-webui = (import inputs.nixpkgs {
+        inherit (prev) system;
+        config.allowUnfree = true;
+      }).open-webui;
+    })
+  ];
+
+  services.open-webui = {
+    enable = true;
+    environment = {
+      SCARF_NO_ANALYTICS = "True";
+      DO_NOT_TRACK = "True";
+      ANONYMIZED_TELEMETRY = "False";
+    };
+  };
+
+  services.nginx.virtualHosts = mkNginxVHosts {
+    domains."ai.baduhai.dev".locations."/".proxyPass = "http://127.0.0.1:8080/";
+  };
+}

data/services.nix

@@ -54,5 +54,10 @@
       domain = "notes.baduhai.dev";
       host = "alexandria";
     }
+    {
+      name = "open-webui";
+      domain = "ai.baduhai.dev";
+      host = "alexandria";
+    }
   ];
 }