add oddbird polyfill - not quite working

Not quite working yet.  polyfill is loaded, but positioned elements are spanning whole viewport.  Parking this for now.

client/homebrew/main.jsx

@@ -1,6 +1,8 @@
 import { createRoot } from 'react-dom/client';
 import Homebrew from './homebrew.jsx';
+import { bootstrapAnchorPositioningPolyfill } from '../components/anchorPositioningPolyfill.js';
 
 const props = window.__INITIAL_PROPS__ || {};
 
 createRoot(document.getElementById('reactRoot')).render(<Homebrew {...props} />);
+bootstrapAnchorPositioningPolyfill();