add required config callout

Author: brendan-defi

site/docs/pages/wallet/wallet-island.mdx

@@ -46,6 +46,11 @@ users a seamless way to interact with their wallet and manage their assets.
 
 Before using these components, ensure you've completed all [Getting Started steps](/getting-started).
 
+:::info
+This component requires a `projectId` and an `apiKey`to be set in the `OnchainKitProvider`. You
+can find your both of these values on [Coinbase Developer Platform](https://portal.cdp.coinbase.com/products/onchainkit).
+:::
+
 ## Quick start
 
 `WalletAdvanced` has two default implementations: