update public_shortener_url env

frontend/src/routes/(app)/+layout.server.ts

@@ -5,7 +5,7 @@ export const load = (async (event) => {
 	const user = event.locals.userObject
 
 	return {
-		shortener_url: PUBLIC_SHORTENER_URL,
+		shortener_url: process.env.PUBLIC_SHORTENER_URL ?? 's.tzgyn.com',
 		user: user,
 	}
 }) satisfies LayoutServerLoad