refactor!: serve the static frontend trough the backend (#520)

Co-authored-by: Alessandro (Ale) Segala <43508+ItalyPaleAle@users.noreply.github.com>

frontend/src/routes/authorize/+page.ts

@@ -0,0 +1,19 @@
+import OidcService from '$lib/services/oidc-service';
+import type { PageLoad } from './$types';
+
+export const load: PageLoad = async ({ url }) => {
+	const clientId = url.searchParams.get('client_id');
+	const oidcService = new OidcService();
+
+	const client = await oidcService.getClientMetaData(clientId!);
+
+	return {
+		scope: url.searchParams.get('scope')!,
+		nonce: url.searchParams.get('nonce') || undefined,
+		state: url.searchParams.get('state')!,
+		callbackURL: url.searchParams.get('redirect_uri')!,
+		client,
+		codeChallenge: url.searchParams.get('code_challenge')!,
+		codeChallengeMethod: url.searchParams.get('code_challenge_method')!
+	};
+};