Update .env.example

Author: chenkie

00-Starter-Seed/.env.example

@@ -1,4 +1,4 @@
 AUTH0_CLIENT_ID={CLIENT_ID}
 AUTH0_DOMAIN={DOMAIN}
 AUTH0_SECRET={CLIENT_SECRET}
-AUTH0_CALLBACK_URL={CALLBACK_URL}
+AUTH0_CALLBACK_URL=http://localhost:3000/