Add host-meta

lib/nulla_web/controllers/hostmeta_controller.ex

@@ -0,0 +1,20 @@
+defmodule NullaWeb.HostmetaController do
+  use NullaWeb, :controller
+  alias Nulla.Models.InstanceSettings
+
+  def index(conn, _params) do
+    instance_settings = InstanceSettings.get_instance_settings!()
+    domain = instance_settings.domain
+
+    xml = """
+    <?xml version="1.0" encoding="UTF-8"?>
+    <XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">
+      <Link rel="lrdd" type="application/xrd+xml" template="https://#{domain}/.well-known/webfinger?resource={uri}"/>
+    </XRD>
+    """
+
+    conn
+    |> put_resp_content_type("application/xrd+xml")
+    |> send_resp(200, xml)
+  end
+end

lib/nulla_web/router.ex

@@ -17,6 +17,7 @@ defmodule NullaWeb.Router do
   scope "/", NullaWeb do
     pipe_through :browser
 
+    get "/.well-known/host-meta", HostmetaController, :index
     get "/.well-known/webfinger", WebfingerController, :index
     get "/.well-known/nodeinfo", NodeinfoController, :index
     get "/nodeinfo/2.0", NodeinfoController, :show