Added react-oidc (use demo/demo)

Added an example of an authentication protected page (tenders)
Added an example with the built in proxy (to combat CORS) (tendersguru)

src/infrastructure/sso/overrides/Authenticating.tsx

@@ -0,0 +1,9 @@
+import { FunctionComponent } from "react";
+import { SSOResult } from "../models/SSOResult";
+
+export const Authenticating: FunctionComponent<SSOResult> = ({ configurationName }) => (
+  <>
+    <h1>Authentication in progress for {configurationName}</h1>
+    <p>You will be redirected to the login page.</p>
+  </>
+);