add netlify builder to capture social images

plus also added an invalidator that should invalidate the image each
month

app/web/src/components/Seo/Seo.tsx

@@ -0,0 +1,24 @@
+import { Helmet } from 'react-helmet'
+
+const Seo = ({ title, description, lang, socialImageUrl}: { title: string; description: string; lang: string; socialImageUrl?: string}) => {
+  return (
+    <>
+      <Helmet
+        htmlAttributes={{
+          lang,
+        }}
+        title={title}
+        titleTemplate={`Cadhub - ${title}`}
+      >
+        <meta property="og:locale" content={lang} />
+        <meta property="og:title" content={title} />
+        <meta property="og:description" content={description} />
+        <meta name="description" content={description} />
+        <meta property="og:image" content={socialImageUrl} />
+        <title>Cadhub - {title}</title>
+      </Helmet>
+    </>
+  )
+}
+
+export default Seo