Add nodeinfo

lib/nulla_web/controllers/nodeinfo_controller.ex

@@ -0,0 +1,28 @@
+defmodule NullaWeb.NodeinfoController do
+  use NullaWeb, :controller
+  alias Nulla.Repo
+  alias Nulla.ActivityPub
+  alias Nulla.Models.User
+  alias Nulla.Models.InstanceSettings
+
+  def index(conn, _params) do
+    instance_settings = InstanceSettings.get_instance_settings!()
+    domain = instance_settings.domain
+
+    json(conn, ActivityPub.nodeinfo(domain))
+  end
+
+  def show(conn, _params) do
+    version = Application.spec(:nulla, :vsn) |> to_string()
+
+    users = %{
+      total: 0,
+      month: 0,
+      halfyear: 0
+    }
+
+    instance_settings = InstanceSettings.get_instance_settings!()
+
+    json(conn, ActivityPub.nodeinfo(version, users, instance_settings))
+  end
+end