chore: only gather analytics on hexdocs.pm

mix.exs

@@ -107,7 +107,15 @@ defmodule AshPhoenix.MixProject do
       before_closing_head_tag: fn type ->
         if type == :html do
           """
-          <script defer data-domain="ashhexdocs" src="https://plausible.io/js/script.js"></script>
+          <script>
+            if (location.hostname === "hexdocs.pm") {
+              var script = document.createElement("script");
+              script.src = "https://plausible.io/js/script.js";
+              script.setAttribute("defer", "defer")
+              script.setAttribute("data-domain", "ashhexdocs")
+              document.head.appendChild(script);
+            }
+          </script>
           """
         end
       end,