fix favicon

modules/server/containers/apps/favicon.nix

@@ -18,6 +18,7 @@ let
     "^/(.*/)?"
     + "(fav(icon)?(-[0-9]+x[0-9]+)?\\.(ico|png|svg)"
     + "|logo\\.(ico)"
+    + "|fav([0-9]+)?\\.(ico|png)"
     + "|apple-touch-icon(-precomposed)?\\.png"
     + "|android-chrome-[0-9]+x[0-9]+\\.png"
     + "|mstile-[0-9]+x[0-9]+\\.png)$";